Pena worked on bunting this spring and tried to get on base with a bunt single when he led off the seventh inning in Saturday's 5-3 win over the Pirates. He reached on a walk instead.
"When they're that exaggerated and one swing of the bat can't help us, why not?" Cubs manager Mike Quade said. "The fact that he's even interested says a lot about his ideas of team and helping a club win a game. Knowing him like I do, late in a game if he becomes accomplished like that, he'll do it all game."
Pena has bunted in the past.
"It's one of those tricks I have in my back pocket," he said. "It's not an easy thing to do. My heart starts racing 100 miles an hour when I start thinking about it. I try to control my breathing.
"If the situation is right and it's the right play, I'm going to do it," he said. "It all depends on how the game is going."