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6/8/2014 7:50 P.M. ET

Gallo, Gonzalez promoted to Double-A Frisco

ARLINGTON -- Two of the Rangers' top prospects have been promoted.

Joey Gallo (ranked as the organization's No. 4 prospect by MLB.com) and Alex "Chi Chi" Gonzalez (No. 6) have both been moved to Double-A Frisco from Class A Advanced Myrtle Beach.

Neither is expected to play Sunday night in Frisco, but Gallo has officially been added to the roster. Gonzalez could make his first start as early as Tuesday.

Gallo, a 20-year-old third baseman, leads the Minor Leagues in home runs with 21 and is batting .323 with 50 RBIs. Gonzalez, a pitcher, was the Rangers' top pick in the 2013 First-Year Player Draft. In Myrtle Beach, he went 5-2 in 11 starts with a 2.62 ERA.

So that Gallo could be added to the roster immediately, Chris Grayson was moved down to Myrtle Beach.

Odor exits due to right shoulder sprain

ARLINGTON -- Rangers second baseman Rougned Odor exited Sunday's 3-2 loss against the Indians in the fifth inning with a right shoulder sprain and is listed as day to day.

After hitting a leadoff single in the fifth, Odor hurt his shoulder as he unsuccessfully attempted to slide back into first on a pickoff throw from catcher Yan Gomes. He will undergo further examination on Monday.

MLB.com ranks Odor as the Rangers' No. 2 prospect.

The 20-year-old was 1-for-2 on Sunday before exiting and is batting .290 on the season. He was replaced by utility infielder Luis Sardinas.

"He never slid," Rangers manager Ron Washington said. "He made a move to go back, and his shoulder came out -- never slid."

Odor's injury occurred just hours after the Rangers announced that first baseman Mitch Moreland would undergo left ankle reconstructive surgery and miss three months.

"Work as usual, come in prepared to play a ballgame," said Washington of his team's approach. "That's all you can do."

Rangers to check all options to fill first base

ARLINGTON -- When Prince Fielder had season-ending surgery to repair a herniated disk in his neck, Mitch Moreland was the obvious replacement at first base for the Rangers.

But with Moreland sidelined due to his impending left ankle reconstruction surgery, the Rangers don't have a true first baseman on the big league roster. Donnie Murphy, a second baseman, played first base for the first time in the Majors on June 1 against the Nationals, and he was back there again on Sunday.

"Today, I've got an option. I got Murphy over there," Rangers manager Ron Washington said. "Tomorrow, it may be someone else."

Murphy said Moreland helped him when he played first against the Nats at Nationals Park and that he'll have to readjust quickly.

"The day I played in D.C. he asked me if I had any questions, feel free to ask," Murphy said. "I'm always up for suggestions. It's a new position to me."

Outfielder Jim Adduci is the most obvious choice for first base, but on Saturday night, Adduci jammed his already-injured left little finger in a play at first base in Triple-A Round Rock. He'll see a hand specialist this week.

"When it rains, it pours," general manager Jon Daniels said. "He's sore. He'll see the hand specialist … hopefully he just kind of jammed it, and didn't re-inure it, but we'll know more [Monday]. He would be the most likely guy."

Washington and Daniels said that the club will explore internal and external options. Catchers Chris Gimenez and Robert Chirinos have both played a little bit of first base.

"I've still got over 100 games left," Washington said. "Just trying to make the guys that I do have believe they can and just go to war. That's it."

Worth noting

• The Rangers have a league-leading 12 players on the disabled list.

Grace Raynor is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.