The 21-year-old right-hander allowed an unearned run on two hits over five innings as the Express cruised past the host Oklahoma City RedHawks, 6-2, on Tuesday night. He fanned nine -- including five straight between the first and second innings -- and walked three.
In 15 2/3 innings this season -- 4 2/3 at Class A Advanced Myrtle Beach and 11 for Round Rock -- Ramirez has given up an unearned run on six hits while striking out 23.
Ramirez (2-0), a first-round pick by the Rangers in the 2007 Draft, threw 96 pitches -- 61 for strikes.
The RedHawks fared no better against Ryan Tucker, who came on in relief of Ramirez in the sixth. The right-hander set down all six batters he faced, fanning four. Mark Lowe closed out the win for Round Rock, allowing one run on three hits over two frames.
The Express jumped out to a 3-0 lead with four hits and a bases-loaded walk in the second. Center fielder Craig Gentry drove in a pair of runs with a double to right.
Catcher Taylor Teagarden tripled, doubled and drove in a run for Round Rock. He has a hit in each of the six games he's played this season.
Oklahoma City shortstop Tommy Manzella had three of his team's five hits in the game. The RedHawks struck out 16 times and went 0-for-8 with runners in scoring position.
Starter Sergio Perez (0-2) took the loss, allowing six runs on eight hits over four innings. He walked one and struck out one. A quartet of RedHawks relievers held Round Rock in check the rest of the way, yielding just two hits.