One of the best aspects of early April baseball is all the aces start on Opening Day. Then a few days later they meet again. Usually by each pitcher's third or fourth starts, the schedules get out of whack -- teams don't have the same off days, some teams will skip the fifth starter and so on. After those first couple of starts, ace-versus-ace matchups are more of a random occurrence throughout the baseball season. And when they do meet, you don't get a whole slate of them like we do Sunday.
Here are eight matchups to watch (pitchers' stats from opening start in parentheses) -- and these don't even include Chris Sale, David Price, Marlins 20-year-old rookie Jose Fernandez or Dodgers rookie Hyun-Jin Ryu. If you're not going to the ballpark, it looks like a good afternoon to sit inside. (Just get your exercise in before the games start!)
8. Diamondbacks at Brewers
Two pitchers trying to prove they are No. 1s. Kennedy was two years ago when he went 21-4 with a 2.88 ERA and finished fourth in the Cy Young vote. He went 15-12 with a 4.02 ERA last year, but looked very good in beating St. Louis in his opener. Gallardo is 47-26 with a 3.63 ERA over the past three seasons. He walked 81 batters last year, so unless he cuts down on the free passes, he'll remain more of a No. 2. And the 1-4 Brewers are already reeling with Aramis Ramirez heading to the DL and the bullpen struggling again. Can you go nine, Yovani?
7. Cubs at Braves
The former Notre Dame wide receiver showed in his first start that there was nothing fluky about last year's strong performance. He blew away the Pirates with his mid-90s heat, slider, cut fastball and splitter. He'll find the Atlanta lineup a little tougher, especially the red-hot Justin Upton, who already has five home runs in five games. Hudson isn't quite an ace anymore, but you know what you're going to get: a lot of ground balls. The flame-throwing kid against the wily veteran. How can you not watch this one?
6. Red Sox at Blue Jays
Lester is trying to prove that he still belongs with the other names on this list after struggling in 2012. He scuffled through his Opening Day start against the Yankees, striking out seven but throwing 96 pitches in five innings. A couple of things to watch with Dickey: He walked four in his first start, something he did just once last year in his Cy Young campaign with the Mets (also in his first start); and catcher J.P. Arencibia really struggled with the knuckleball, allowing three passed balls.
5. Royals at Phillies
Shields is coming off a 1-0 loss to Sale while Hamels allowed three home runs for just the eighth time in his career. The first trip through the revamped rotation showed positive signs for Kansas City: 11 runs in 28 innings and a nifty 32/5 K/BB ratio. But Shields will likely have to do better at getting the ball on the ground. He had just four ground balls and 10 fly balls in his first start (and six line drives). Last year, his ratio was 336 ground balls and 186 fly balls. Give up too many fly balls in Philly, and a couple may find the seats.
4. Cardinals at Giants
Cain came up on the no-decision end of Clayton Kershaw's Opening Day shutout, leaving after six impressive innings. Cain is tough at home: 2.03 ERA at AT&T last year, 2.80 in 2011, with only 11 home runs allowed over the two seasons. His fly balls go to die in San Francisco. The Giants have scored just 12 runs in their first five games, so Cain may have to put up another zero to beat Wainwright.
3. Yankees at Tigers
It's way too early to call this a must-win game for the Yankees, but they're 1-4 and now have to face Verlander. In their first time through the rotation, Yankees starters pitched the second-fewest innings of any club (23, one-third more than the Padres), so New York is desperate for Sabathia to pitch deep into the game. Verlander has never started a season 2-0. The Yankees hit him well in three regular-season matchups last year: 25 hits, including four home runs, and 12 runs in 20 innings.
2. Nationals at Reds
Any Strasburg start is must-see TV, especially when facing the Reds -- the team many consider the second best in the NL behind the Nationals. Strasburg's first start against the Marlins was interesting in that he shut them down but struck out just three in seven innings and was removed after 80 pitches. Strasburg has never pitched more than seven innings in any of his 46 career starts. In my book, you can't call him a true No. 1 until he proves he can go eight or nine once in awhile to help remove some of that stress on the bullpen.
1. Angels at Rangers
My must-watch game of the day, and not just because it's the national game on Sunday night on ESPN. This game has everything going for it: Darvish coming off his near-perfect game against the Astros, division rivals, Josh Hamilton back in Texas and Weaver trying to keep intact a 13-game winning streak in March/April. Keys to watch: Hamilton is 1-for-20 with 10 strikeouts so far and Mike Trout was 6-for-17 with two homers and a double off Darvish last year.