ARLINGTON -- Koji Uehara tossed one scoreless inning in the first outing of his rehab assignment for Triple-A Round Rock on Tuesday, striking out two and throwing 14 of 18 pitches for strikes. He is expected to pitch another inning for Round Rock on Friday before returning to the Rangers on Sunday. "He threw the ball well," manager Ron Washington said. "The ball came out of his hand freely. I haven't seen him today. I hope everything works out. He's got one more to go, and hopefully, he'll be ready to compete again." Uehara has been on the 15-day disabled list since June 15 with a strained right lat muscle. He made one rehab outing with Round Rock, pitching one scoreless inning July 14 before suffering a setback and being forced to wait until this week to begin another rehab assignment. He posted a 2.11 ERA in 20 appearances for the Rangers this season, striking out 22 and walking two in 21 1/3 innings.