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8/3/2014 12:09 P.M. ET

Ross continues to progress in Minors

CLEVELAND -- Robbie Ross Jr. is continuing his resurgence at Triple-A Round Rock. The Rangers still want him to continue what he is doing, but he is catching people's attention after throwing a complete game on Saturday night.

Pitching against Memphis, Ross allowed two runs in nine innings on five hits, no walks and five strikeouts. He is 3-1 with a 2.25 ERA in his last four starts.

"Progress is the first word that comes to mind," assistant general manager Thad Levine said. "He has done a very good job working with [pitching coach] Brad Holman and [manager] Steve Buechele and we've seen the results the last couple of outings."

Ross, after two years as a reliever, started the season in the Rangers' rotation, then was moved to the bullpen after going 1-4 with a 4.78 ERA in nine starts. He had a 9.00 ERA in nine relief appearances before being sent to the Minor Leagues on June 17. Ross has been starting at Round Rock because the Rangers want him to get as much work as possible, but his future role in the big leagues remains undecided.

"I think we see him as a versatile pitcher who has a chance to contribute on a 12-man staff in either role," Levine said. "We're going to keep him stretched out so he can maintain that versatility. What else we do with the club this winter will help define his role and his progress will help define his role."

Choo to split time in outfield, at DH for rest of season

CLEVELAND -- Shin-Soo Choo started at designated hitter for the second straight game on Sunday. It was also the eighth time he has started at the position in 15 games since the All-Star break.

That's probably the way it will be the rest of the season as Choo deals with his sprained left ankle and the Rangers look at Jim Adduci and Daniel Robertson. Manager Ron Washington said Choo will probably split his time between the outfield and designated hitter.

'I'm going to give him days at DH and some days in the outfield," Washington said. "The guy doesn't like to DH so I've got to get him time in the outfield."

Because of the ankle, the Rangers are probably a better team when Choo is at designated hitter. Both Robertson and Adduci can cover more ground in the outfield. Robertson made a terrific running catch at the wall on Carlos Santana's fourth-inning drive on Saturday, taking a run away from the Indians. Adduci made two terrific catches on Wednesday night in a 3-2 victory over the Yankees.

Choo injured the ankle on April 21 against the Athletics and has been dealing with it ever since. The situation has not improved and Choo went into Sunday hitting .192 in his last 52 games.

"The ankle has been up and down," Choo said. "Some days it's good and some days it's sore. I've said many times I don't like to DH, but in this situation he's giving me time at DH to help the ankle feel good."

Choo is not the Rangers' only hobbled outfielder. Alex Rios still gets treatment for his right ankle, which forced him out of a game against the Blue Jays on July 19.

"I'm still going to run him out there at DH when I can but he wants to play the outfield," Washington said. "I haven't seen it hinder him."

Worth noting

• Catcher Geovany Soto, on the disabled list with a strained right groin muscle, is 2-for-5 in two games at Triple-A Round Rock since starting his medical rehabilitation assignment. He could be activated on Friday when the Rangers open a three-game series with the Astros in Houston.

• Former Rangers pitcher Scott Feldman started for the Astros on Sunday. He'll likely start against the Rangers on Saturday in Houston, possibly against Yu Darvish. If so, it will be the second time they have faced each other. Darvish and Feldman waged a terrific pitching duel on April 11 in Arlington with the Rangers winning, 1-0, in 12 innings.

• At this point, the Astros rotation for that series lines up as Brett Oberholtzer, Feldman and Dallas Keuchel.

Nick Tepesch, who was skipped in his last start because of a sore left knee, threw a bullpen on Sunday. The Rangers will see how he recovers before determining if he will pitch on Wednesday against the White Sox. If not, the Rangers will go with Jerome Williams.

T.R. Sullivan is a reporter for MLB.com. Read his blog, Postcards from Elysian Fields, and follow him on Twitter @Sullivan_Ranger This story was not subject to the approval of Major League Baseball or its clubs.