Here is a look at how each of the prospects fared in their first games and how they're playing so far in their brief careers. Players appear in order of Law's offseason ranking (in parentheses). All stats are updated through Aug. 3.
Kris Bryant (1), 3B, Cubs: Debuted on April 17
After just seven games for Triple-A Iowa, Bryant was called up in mid-April by the Cubs only one day after it was ensured that he wouldn't be a free agent until after the 2021 season. Bryant struggled in his debut, striking out his first three times at-bat and going 0-for-4. He collected his first major league hit in his second game, going 2-for-3 with his first RBI. Through 95 games, Bryant has a .791 OPS, with 14 homers and 61 RBIs (tied with Anthony Rizzo for the team lead).
Byron Buxton (2), CF, Twins: Debuted on June 14
With Torii Hunter suspended and Aaron Hicks injured, the Twins called up the 21-year-old Buxton from Double-A Chattanooga. Buxton, who has missed considerable time over the past two years with injuries, hit .283 with six homers, 37 RBIs and 20 stolen bases in 59 games with Chattanooga this season. Buxton went 0-for-4 in his debut, but scored the winning run in the top of the ninth for the Twins. He collected his first big-league hit (a triple) in his second game, going 1-for-3 and scoring two runs. Buxton is currently on the 15-day disabled list with a left-thumb sprain. In 11 games he hit .189 and struck out 15 times.
Carlos Correa (3), SS, Astros: Debuted on June 8
Just 20 years old, Correa was called up by the Astros after playing in 53 minor league games between Double-A and Triple-A this season. Making his debut in Chicago, and facing one of baseball's best pitchers (Chris Sale), Correa collected his first big league hit on an infield single, driving in the Astros' only run. Through 48 games, Correa is hitting .297 with 13 home runs and a team-high .917 OPS (mininum 100 at-bats).
Addison Russell (4), SS/2B, Cubs: Debuted on April 21
While Russell's ultimate position will probably be shortstop, where he primarily played in the minors, the Cubs called him up to play second base. Like Bryant, Russell had a tough debut, going 0-for-5 and striking out three times. He has an OPS of .671 through 87 games with seven homers and 27 RBIs.
Corey Seager (5), SS/3B, Dodgers: Debuted on September 3
Went 2-for-4 with a double and two RBIs in the his big-league debut. Seager was called up when Enrique Hernandez went on the 15-day disabled list with a strained left hamstring. Seager was the No. 1 prospect in Law's updated July rankings.
Francisco Lindor (6), SS, Indians: Debuted on June 14
Lindor, 21, hit .279 with two home runs, 22 RBIs and eight stolen bases at Triple-A Columbus this season before being called up by the Indians. He didn't start his first game, entering as a pinch hitter for DH David Murphy. He collected his first hit -- a single -- in the ninth inning. Through 43 games, Lindor is hitting .253 with five homers and 19 RBIs.
Blake Swihart (10), C, Red Sox: Debuted on May 2
Called up to Boston when catcher Ryan Hanigan broke his right hand. Drafted No. 26 overall in the 2011 draft, Swihart was the top-rated catching prospect in the minors when he was called up. He went 1-for-3 in his debut with one run scored. After hitting .338 in 18 games at Triple-A Pawtucket, Swihart has struggled at the plate with Boston. Through 48 games, the switch-hitting catcher has a .617 OPS and has struck out 44 times with just eight walks.
Joey Gallo (11), 3B, Rangers: Debuted on June 2
One of the top power-hitting prospects in baseball, Gallo was called up to Texas when Adrian Beltre was placed on the 15-day disabled list with a sprained left thumb. Unlike some of the other prospects on this list, Gallo had a monster debut, going 3-for-4 with a homer, four RBIs and three runs scored. In 25 games with Texas, Gallo had an OPS of .754, with five homers and 13 RBIs before being sent back to Triple-A. One concern with Gallo has always been his high strikeout totals and that continued in the majors with 43 strikeouts in 87 at bats.
Carlos Rodon (12), LHP, White Sox: Debuted on April 21
Rodon was called up after just eight combined minor league starts in 2015 and 2014. He made his debut for the White Sox out of the bullpen. He pitched three times in relief before making his first start on May 10, going six innings and picking up his first major league win. In 80 innings Rodon has 87 strikeouts and an ERA of 4.84. Control has been a bit of an issue early in his career with 48 walks, an average of 5.33 per nine innings.
Miguel Sano (15), 3B, Twins: Debuted on July 2
Sano, who missed all of 2014 after Tommy John surgery, was called up after hitting .274 with 15 homers and 48 RBI is 66 games at Double-A this season. The 22-year-old made his major league debut at DH, collecting his first hit on an infield single. In 25 games, Sano has an OPS of .904 with four homers and 14 RBIs.
Noah Syndergaard (17), RHP, Mets: Debuted on May 12
Syndergaard was called up on May 8, but didn't make his debut until four days later, taking the loss in 5 ⅓ innings of work against the Cubs. In 15 starts, Syndergaard is 6-5 with a 2.66 ERA and 100 strikeouts in 94 2/3 innings.
Henry Owens (20), LHP, Red Sox: Debuted on Aug. 4
Owens got his first taste of The Show at, of all places, Yankee Stadium. The Red Sox were pounded 13-3, and Owens took the loss, though most of the Bombers' scoring came against Boston's bullpen. Owens' line: 5 IP, 5 H, 3 ER, 5 Ks, 1 BB.
Archie Bradley (21), RHP, Diamondbacks: Debuted on April 11
After a 2014 minor league season that was marred by an elbow injury, Bradley opened the 2015 season in the majors with the Diamondbacks, making his MLB debut on April 11 against the Dodgers. He pitched six shutout innings in a 6-1 D-backs win. Bradley's season has been interrupted by injuries, suffering a sinus fracture in late April when he was hit in the face by a line drive and more recently going on the DL in June with shoulder tendinitis. In eight starts he's 2-3 with a 5.80 ERA.
Jon Gray (22), RHP, Rockies: Debuted on August 4
The No. 3 overall pick in the 2013 MLB draft, Jon Gray got his first taste of the majors and life at Coors Field on August 4 against the Mariners. The Rockies' top pitching prospect settled down after allowing three runs -- two earned -- in a 33-pitch first inning, but was limited to just four frames with Colorado opting to play it safe by removing Gray after 77 pitches. In his second start, Gray impressed at Citi Field when he held the Mets to just one hit -- a solo home run by Travis d'Arnaud -- in six innings of work.
Jose Peraza (24), 2B, Dodgers: Debuted on August 10
After impressing in 10 games at Triple-A Oklahoma City since being acquired in a 13-player trade at the deadline, Jose Peraza made his major league debut when Dodgers second baseman Howie Kendrick landed on the disabled list. Taking advantage of Bryce Harper's missed slide in right field, turned on the jets and legged out a triple for his first major league hit, showing the speed that has become his calling card as a prospect.
Eduardo Rodriguez (29), LHP, Red Sox: Debuted on May 28
The 22-year-old lefty, who was acquired from the Orioles for Andrew Miller at last season's trade deadline, has established himself as the Red Sox's top pitching prospect. Rodriguez was initially called up for just one start, but after giving up zero runs in 7⅔ innings in his debut the Red Sox gave him another start. He was equally as impressive in his next two starts, giving up just one run in 13 innings and has remained in Boston's rotation. In 12 starts, Rodriguez is 6-3 with a 4.34 ERA and 56 strikeouts in 66 1/3 innings.
Alex Meyer (30), RHP, Twins: Debuted on June 26
Meyer was promoted and added to the Twins' bullpen. His Twins career got off to a rocky start when he gave up four runs and two homers in 1⅔ innings in his big league debut. He appeared in one more game before being sent back to Triple-A.
Michael Conforto (41), LF, Mets. Debuted on July 24
Conforto was called up to New York from Double-A Binghamton, where he hit .312 with an .889 OPS in 45 games. He started the year in Single-A St. Lucie. Started his first MLB game in left field, going 0-for-3 with one RBI. He followed that up in his second game with a 4-for-4 performance, scoring four runs and knocking in one. Conforto, who hit his first major league home run Monday night, is batting .261 with an .871 OPS through seven games.
Kevin Plawecki (45), C, Mets: Debuted on April 21
Plawecki was thrust into the Mets' lineup when Travis d'Arnaud suffered a fractured right pinkie. In his first game with the Mets, Plawecki went 2-for-4 in a 7-1 win. Through 60 games with the Mets, Plawecki is hitting .236 with two homers and 17 RBIs.
Vincent Velasquez (56), RHP, Astros: Debuted on June 10
The 23-year-old right-hander, who was called up from Double-A Corpus Christi, pitched five scoreless innings in his MLB debut, striking out five and walking four. He left with a 1-0 lead, although the Astros would end up losing the game 4-1. In nine games (seven starts), Velasquez was 1-1 with a 3.67 ERA and 43 strikeouts in 41 2/3 innings before being sent back to Corpus Christi.
Aaron Nola (57), RHP, Phillies: Debuted on July 21
Went 10-4 with a 2.39 ERA between Double-A (Reading) and Triple-A (Lehigh Valley) this season. Nola was a tough-luck loser in his MLB debut, giving up just one run in six innings in a loss to the Tampa Bay Rays. The one run came on a homer by opposing starter pitcher Nathan Karns. In the six innings Nola gave up five hits and struck out six batters. Nola got his first win in his second start, giving up four earned runs in 7 2/3 innings. He's now 2-1 with a 3.38 ERA in three starts.
Stephen Piscotty (62), OF/INF, Cardinals: Debuted on July 21
Mostly a third baseman in college at Stanford, Piscotty was the No. 36 overall pick in the 2012 draft. Playing primarily in the outfield, Piscotty was batting .272 with 11 home runs and 41 RBI in his 87 games at Triple-A Memphis this season. Piscotty hit ninth and played left field in his MLB debut, going 1 for 4 with his first hit coming on an infield single. Through 12 games, Piscotty is off to a solid start; he's hitting .400 with four doubles among his first 14 hits.
Joe Ross (63), RHP, Nationals: Debuted on June 6
With Stephen Strasburg and Doug Fister on the DL, the Nationals called up Ross from Double-A Harrisburg. Ross' debut got off to a good start as he retired the first nine batters he faced, before the Cubs got to him for one run in the fourth and two in the fifth. In his loss he gave up six hits and three earned runs in five innings. Ross won each of his next two starts, pitching into the seventh inning in each. In six starts (39 innings) he has an ERA of 3.00 with 40 strikeouts and just three walks.
Austin Hedges (74), C, Padres: Debuted on May 4
Hedges, who is backing up starting catcher Derek Norris, was one of the top defensive catching prospects in the minors. He saw his first big league action as a pinch hitter, striking out in his first at-bat. As a backup, Hedges has played sparingly, hitting just .188 in 27 games (12 hits in 64 at-bats).
Greg Bird (80), 1B, Yankees: Debuted on August 13
Bird went 0-for-5 in his first MLB game, collecting his first hit in his second game on August 15. Since being called up, Bird is hitting .254 with three homers and 12 RBIs in 18 games (through September 3).
Alex "Chi Chi" Gonzalez (86), RHP, Rangers: Debuted on May 30
A first-round pick (No. 23 overall) in the 2013 draft out of Oral Roberts University. Gonzalez pitched 5⅔ innings for a win in his MLB debut against the Red Sox. In seven starts, Gonzalez was 2-4 with a 3.74 ERA. He was sent back to Triple-A in early July.
Trea Turner (88), SS, Nationals: Debuted on August 21
After starting his MLB career 0-for-9, Turner got his first hit on September 3 on an infield single more than a week after getting called up. The Nats acquired Turner as part of the trade that sent Steven Souza Jr. to the Rays and Wil Myers to the Padres. The Nats also got Joe Ross in the deal.
Kyle Schwarber (90), C/LF, Cubs: Debuted on June 16
Schwarber, who was No. 90 in the offseason rankings, had moved up to No. 15 in Law's most recent Top 25. Through 58 games with Double-A Tennessee, the 2014 first-round pick had an OPS of 1.017 with 13 homers and 39 RBIs. Schwarber came off the bench for his MLB debut (June 16) after catcher Miguel Montero was ejected before the bottom of the eighth inning. Schwarber struck out looking in his only at-bat in his debut. After returning to Triple-A in late June, Schwarber returned to the big leagues on July 17. In 23 games he's hitting .333 with four homers and 13 RBIs and a .977 OPS.
A.J. Cole (98), RHP, Nationals: Debuted on April 28
A fourth-round pick in the 2010 draft, Cole made his MLB debut on April 28 against the Braves, giving up nine hits and nine runs (only four earned) in just two innings. He pitched twice more in relief before being sent back to Triple-A Syracuse.