"I think they're going to have similar roles. When you have multiple guys with similar talents, we can keep guys a little bit more fresh early on where you can rotate some guys through," Farrell said. "We know with what both guys are coming off of, high number of appearances last year. We'd like to think we can alternate game to game rather than going back to back earlier in the year. That way we can keep guys more fresh, the deeper we go into the season."
Mujica was the Cardinals' closer for most of the 2013 season before fatigue caught up with him down the stretch. Tazawa faltered a little down the stretch last year but was a stalwart in the postseason.
Ian Browne is a reporter for MLB.com. Read his blog, Brownie Points, and follow him on Twitter @IanMBrowne. This story was not subject to the approval of Major League Baseball or its clubs.