Grimm, called up from Triple-A Round Rock earlier Thursday, went four innings in the Texas Rangers' 4-3 victory over the Seattle Mariners. The 24-year-old right-hander gave up a leadoff homer to Franklin Gutierrez in the bottom of the first. He threw 92 pitches, allowing two runs, both earned, on five hits while striking out two and walking three.
The Rangers called up Grimm after placing opening-day starting pitcher Matt Harrison on the 15-day disabled list with an inflamed nerve in his lower back. Grimm made two major league starts for the team last season.
Joe Ortiz (1-0) pitched two innings in relief of Grimm. Joe Nathan pitched the ninth for his third save.David Murphy snapped a 2-all tie with an RBI single in the fifth for the Rangers, who toppled Seattle ace Felix Hernandez. Texas scored twice in the fifth to deny Hernandez (1-2) a shot at his 100th career victory.
In his first home start since he signed a $175 million extension in the offseason, Hernandez allowed 10 hits and three earned runs, leaving with two outs in the seventh.