Parra had lots of playing time earlier this season during center fielder Chris Young's stint on the disabled list, and Parra has been getting more starts in center recently.
"Parra's played a ton of games, gotten a ton of at-bats," Gibson said. "He's played at times, he's sat at times. C.Y. has struggled as of late so I've played [Parra] more. The thing about Parra is he has enthusiasm regardless of whether he's playing or not. He's a great teammate. He's always chirping. He chirps at the other team, too. He says some things, kind of challenges people. He's not scared."
Parra is hitting .276 with six homers and 25 RBIs while Young is hitting .202 with eight homers and 19 RBIs.
"I know he's going to play," Gibson said of Parra. "Can I lay it out and say he's going to play three days and C.Y. is going to play two? I can't lay it out, you've just got to look ahead and see what your matchups are, see how guys are swinging, playing. If he's playing better and makes us a better team to win, then he'll play."