Barnes, who had his contract purchased from Triple-A Oklahoma City on Aug. 7, had two consecutive two-hit games entering Friday, which earned him a start in the No. 2 hole in the batting order. He was 2-for-3 in a start on Wednesday and came off the bench and went 2-for-2 on Thursday.
"I'm simplifying things," he said. "I think I was trying to do too much early on and trying to prove to everybody that I can play here. Now that I've been here for a little while, it's just starting to settle down and now I can relax and play the game."
Barnes had 10 hits in 58 at-bats prior to Wednesday with 15 strikeouts. He hadn't been as aggressive as he had been in the Minor Leagues.
"I'm aggressive, and when I'm locked in like that I'll be able to lay off balls and recognize pitches," he said. "Just being aggressive is the biggest thing I've made an adjustment with."