And he seemed to realize the problem on his own -- his arm angle on his release was creeping slightly higher than it had been in the past. So with that in mind, Tateyama took it upon himself to make adjustments on the fly and, judging from the results, they seem to be working quite well for the rookie right-hander.
Including Friday night's 2 2/3 no-hit innings, Tateyama has allowed just one run in 13 second-half appearances over 18 innings, lowering his All-Star break ERA of 4.26 to its current 2.43.
"He knows what adjustments he has to make. The only adjustment I'm looking for is outs," manager Ron Washington said. "Whatever physical adjustment or mental adjustment he made, way to go Yoshi. He has earned all the opportunities that he gets. We haven't given Yoshi anything."
Tateyama has worked at least two innings in five of those last 13 appearances, providing Washington with a valuable long-relief guy and the other relievers with some much-appreciated rest. In his short time with Texas, recently acquired reliever Mike Adams has already taken notice of Tateyama's continuously increasing value to the team.
"He's had to eat some pretty good innings for us," Adams said. "And he's pitched in some real big innings and has saved the rest of the bullpen some. He's been lights out for us."