Position: RP | Age: 29
Current Team: Cubs | Best Fit: Nationals
2016 Stats: 4–1, 1.55 ERA, 0.86 WHIP, 14.0 K/9, 36 Sv

Chapman lost nothing, performance-wise, in a season he started a month late due to his domestic violence suspension and that was split between the Yankees and the Cubs. In fact, he never before threw his fastball harder, averaging a career-best 100.4 mph with the pitch. At the same time, he showed better control than ever, dropping his walk rate from 4.5 to 2.8 per nine. An improving Chapman is a concerning thought to opponents, and while the Nationals should try to sign him to stabilize their long turbulent ninth innings, they'll have competition from his two 2016 teams, among others.

Reign Men: The inside story of the Cubs' Game 7 triumph

SI Apps
We've Got Apps Too
Get expert analysis, unrivaled access, and the award-winning storytelling only SI can provide - from Peter King, Tom Verducci, Lee Jenkins, Seth Davis, and more - delivered straight to you, along with up-to-the-minute news and live scores.