Chatwood's issue, Scioscia said, is nothing structural and is not related to fatigue or wear and tear. Instead, Chatwood is struggling with one of the most basic tenants in pitching: Thou shall not miss with thy fastball.
"We're considering a couple of things," Scioscia said. "Tyler's fastball command was an issue his last three or four starts. That's something we're going to look at."
Since pitching seven strong innings in a win over Baltimore on July 24, Chatwood's effectiveness has plummeted. He's allowed 18 runs in his past four starts for an 8.53 ERA and an 0-3 record.
The common theme throughout all those poor outings is a fastball Chatwood can't control. When a young pitcher falls behind in counts because of his fastball, it's hard for him regain the upper hand in an at-bat.
Such was the case Tuesday night against Texas when he threw a first-pitch strike to just five of 16 batters.
"With Tyler really being a three-pitch pitcher -- and his breaking ball is more of an out pitch -- getting back into counts is really sensitive to his fastball command," Scioscia said. "As that erodes, now you're left with how are you going to get back into counts? If fastball command is not there, you try to get too much of the plate and all of a sudden these guys get pretty good swings at it."
When Chatwood is locating, he's shown that he has the stuff to compete in the big leagues. He held the White Sox to one run over seven innings in just the second start of his career, and he pitched an eight-inning gem against the Indians on May 6.
"His stuff plays in the big leagues," Scioscia said. "He's got a great great life. Four-seamer, two-seamer. When he's hitting his spots and has command of counts, he's pitched some terrific games against some good hitting lineups."