ARLINGTON, Texas -- It's Friday and that means we take stock of how various parts of the Texas Rangers have done over the past week.

STOCK UP

Bullpen. After a shaky start to the season, the bullpen seems to have jelled into a cohesive group that has fairly defined roles. Alexi Ogando, who struggled in the spring so much that he lost his starting job and began the season poorly, has come around and is looking a little more like the guy who pitched so well in relief a few years ago. Jason Frasor brings a veteran presence. Joakim Soria has closing experience and even pitchers who the club is still figuring out -- such as Pedro Figueroa and Shawn Tolleson -- have improved in the past week. The group has some more confidence.

Kevin Kouzmanoff. So far, he's filled in very well for the injured Adrian Beltre, who can not return until April 25 thanks to a disabled list stint because of his strained left quad. Kouzmanoff has hit safely in every game he has played in a Rangers uniform and has shown a penchant for extra-base hits. Few can defend at third base like Beltre, but Kouzmanoff has done a solid job in the field.

Walk-offs. The Rangers have had four this season and two in this current homestand. Robinson Chirinos was the hero April 11 against Houston, a 1-0 win in 12 innings and Leonys Martin delivered an RBI single in the ninth Wednesday. Both walk-off wins in this homestand occurred in Yu Darvish starts.

Leonys Martin. He did it all during the Mariners series. He played solid defense, delivered a game-winning hit and has become a terrific bunter. The only thing he didn't do was yell loud enough (or low enough) for Shin-Soo Choo to hear him Wednesday on a pop fly to center. Martin is making a difference in the bottom of the order.

STOCK DOWN

Hitting with runners in scoring position. It has not been a strong suit for this team, though they were a bit better in those situations Thursday. Still, the team is 11-for-71 (.155) with runners in scoring position in the past eight games.

Offensive catchers. The Rangers aren't getting much offensive production from their catchers. J.P. Arencibia had two RBIs Thursday but neither came on hits. He's hitting .071 on the season and Chirinos is batting .160. That doesn't mean the catchers haven't played well in other facets, but as far as hitting goes, it has not been solid.

Defense. The Rangers lead the AL with 15 errors in 16 games. And in the Seattle series alone they had a few other mistakes that weren't scored errors (but perhaps could have been). This team still isn't as crisp as manager Ron Washington would like it with the gloves or their arms, though middle infielders Josh Wilson and Donnie Murphy have done a good job filling in when out there.

Tanner Scheppers. Big innings have cost Scheppers in three of his four starts and it was a six-run third that ended his afternoon Thursday (the bullpen and offense bailed him out). We'll see if he gets another shot to start when it's his turn in the rotation Tuesday, but he's got to find a way to minimize damage.