"We know Ankiel's a good center fielder. But at this point, I feel good about how both of them play center field," Riggleman said.
"[Bernadina's] been real good. He's made a couple of plays that I don't think anyone else makes, unbelievable plays. There's been a couple of balls that I think showed his comfort level there isn't quite what it is in left."
Riggleman said he was confident he could manage the playing time of Bernadina, Laynce Nix and Ankiel. Even though they are all left-handed, the trio likely will get quite a bit of playing time in left and center field.
"A lot of times those left-handed pitchers don't even want to face those left-handers," Riggleman said. "A lot of times with left-handed starters, if you're a left-handed hitter, you're going to get three or four at-bats against him. It starts to get fairly comfortable, and it becomes the quality of the pitcher -- not whether he's left or right-handed."
With Adam LaRoche on the disabled list, Riggleman has said Michael Morse, Matt Stairs, Alex Cora and even Ankiel could see time at first base. Ankiel has never played first, but has been taking grounders there in practice.