The Houston Astros have one of the better bullpens in baseball, but Jeff Luhnow says he's still on the lookout for additions.

"I think you can always use another good arm," Luhnow said. "You look at the arms we have in the bullpen: we've got a sinker baller, a slider guy, different looks. [Pat] Neshek is a funky guy. The one guy we're probably missing is the flamethrower guy. ... but those guys are hard to find. Certainly we're going to keep our eyes open."

Aroldis Chapman of the Cincinnati Reds is a hard-throwing reliever that is believed to be available.