Adam Warren was the lowest-profile addition of the Cubs' offseason, but he's already emerged as a vital part of the team out to the hottest start in baseball.
Jason Heyward, John Lackey and Ben Zobrist (plus the re-arrival of Dexter Fowler in spring training) got all the headlines as new acquisitons over the winter.
In fact, Warren wasn't even the main focus in the deal that made him a Cub as the return from the New York Yankees for Starlin Castro, the former face of the franchise who tallied 991 hits in six seasons in Chicago.
Yet where would the Cubs be right now without Warren?
The 28-year-old right-hander has pitched the most innings in the National League without giving up an earned run this season (8) and has allowed just two hits and three walks for a sparkling 0.625 WHIP.
"Just as I thought: outstanding," Cubs manager Joe Maddon said. "I try not to abuse him, pretty much. ... I"m very comfortable pitching him in the latter part of the game, whether it's the seventh, eighth, ninth — it doesn't matter to me.
"I think this guy could finish games. He's got that kinda ability; he's got that makeup. You got that kinda weapon in your toolbox — he's good against righties and lefties, he's durable, he's got all this variety of different pitches, fits our culture beautifully. I just don't want to abuse the guy."
Warren has worked as a starter in the past and said the Cubs initially told him they wanted him to work in the rotation at some point down the road.
But for right now, Warren is set as a jack of all trades in the bullpen pitching with confidence.
"I like being versatile," Warren said. "I like being able to do a lot of different things. So if I can continue to do that, that's where I like to be in the bullpen, just because I feel like that helps our team out the most."
Warren — like the rest of the Cubs — doesn't like to think too far ahead. He doesn't worry about what his "title" is in the bullpen, which is a necessary attitude to have with a manager that loves to play the matchups and is constantly tinkering with his relievers.
But Warren has emerged as a high-leverage arm Maddon can combine with Pedro Strop (2.89 ERA, 0.64 WHIP, 4 holds) and Hector Rondon (0.00 ERA, 0.29 WHIP, 4 saves) at the back end of the bullpen.
As the new guy on the pitching staff, Warren made it a point to get out to a good start.
"With a new team, you really want to prove yourself," he said. "So I think you have that chip on your shoulder a little bit to want to go out there and start off hot. But really, I think it's just going out there, having a gameplan with our scouting report and just executing."
Warren feels comfortable with his new team and in the bullpen, crediting his teammates and the Cubs coaching staff for welcoming him in.
Coming from the Yankees — a historic franchise with 27 World Series championships and a penchant for doing things a certain way (such as their no facial hair policy) — it was a little bit of a culture shock for Warren to come to a Cubs team that hasn't won the World Series in more than a century and essentially has no rules in a clubhouse designed to let everybody be themselves.
But the transition has gone as smoothly as possible, Warren said.
"It's completely different," he said. "Here, they've created the atmosphere of just be yourself, be laid back. I like that. I like being able to grow facial hair if you want.
"You start focusing completely on baseball. The atmosphere that fans create out there has been unreal to me. Even when it's been cold, they've been up for every pitch. It's really refreshing to see the excitement around the team."