On Saturday, we took a look at which pending free-agent starters had the most successful regular seasons in terms of velocity, strikeouts, walks, generating ground balls and inducing weak contact. We’ll do the same here with relievers who are scheduled to become free agents in a few weeks (once again, thanks to MLBTR’s Steve Adams for coming up with this method a year ago and to FanGraphs for supplying such invaluable data).
To qualify, a reliever must have thrown at least 20 innings this past regular season. Notably, we’re leaving Sean Doolittle, Mark Melancon, Pedro Strop and Brandon Kintzler off the list. Everyone from that group has either a team option or an opt-out for 2019 (or both in Kintzler’s case), but it appears highly unlikely any will hit free agency. On the other hand, just to be safe, we are including Milwaukee’s Joakim Soria, Oakland’s Fernando Rodney and the White Sox’s Nate Jones.
Soria and the Brewers will have to decide on a $10MM mutual option, but he may instead return to free agency on the heels of a strong season. Both Rodney’s age (42 in March) and the Athletics’ low payroll seem to increase the odds of them buying out the journeyman for $250K instead of exercising his $4.25MM option. Jones has a similarly affordable option ($4.65MM), so it’s hard to imagine the White Sox cutting ties with him in favor of a $1.25MM buyout, but perhaps his history of injuries will convince the team to go in another direction. (The guess is he’ll remain with the White Sox, but we’ll err on the side of caution.)
Hardest Throwers (FanGraphs leaderboard)
League average = 93.4 mph
- Joe Kelly: 98.1 mph fastball velocity
- Nate Jones: 97.2 mph
- Craig Kimbrel: 97.1 mph
- Kelvin Herrera: 96.5 mph
- Jeurys Familia: 96.2 mph
- Ryan Madson: 95.8 mph
- John Axford: 95.6 mph
- Daniel Hudson: 95.4 mph
- Zach McAllister: 95.2 mph
- Fernando Rodney: 95.2 mph
Top Strikeout Arms (FanGraphs leaderboard)
League average = 23.2 K%, 8.95 K/9
- Craig Kimbrel: 38.9 K%, 13.86 K/9
- Adam Ottavino: 36.3 K%, 12.98 K/9
- David Robertson: 32.2 K%, 11.76 K/9
- Tyler Clippard: 30.2 K%, 11.17 K/9
- Joakim Soria: 29.4 K%, 11.13 K/9
- Andrew Miller: 29.2 K%, 11.91 K/9
- Justin Wilson: 29.2 K%, 11.36 K/9
- Tony Sipp: 27.8 K%, 9.78 K/9
- Cody Allen: 27.7 K%, 10.75 K/9
- Jeurys Familia: 27.5 K%, 10.38 K/9
Fewest Walks (FanGraphs leaderboard)
League average = 9.3 BB%, 3.57 BB/9
- Jesse Chavez: 4.5 BB%, 1.6 BB/9
- Tony Barnette: 4.8 BB%, 1.71 BB/9
- Zach McAllister: 5.0 BB%, 2.0 BB/9
- Kelvin Herrera: 5.5 BB%, 2.03 BB/9
- Shawn Kelley: 5.8 BB%, 2.02 BB/9
- Sergio Romo: 6.1 BB%, 2.3 BB/9
- Joakim Soria: 6.3 BB%, 2.37 BB/9
- Matt Belisle: 6.8 BB%, 2.88 BB/9
- Ryan Madson: 6.9 BB%, 2.73 BB/9
- Jim Johnson: 7.6 BB%, 2.9 BB/9
Highest Groundball Rates (FanGraphs leaderboard)
League average = 43.5 percent
- Zach Britton: 73.0 percent
- Brad Ziegler: 71.1 percent
- Zach Duke: 59.4 percent
- John Axford: 53.4 percent
- Tony Barnette: 51.2 percent
- Peter Moylan and Blaine Boyer: 51.2 percent
- Jorge De La Rosa: 50.9 percent
- Jim Johnson: 49.2 percent
- Jake Diekman: 47.8 percent
- Andrew Miller: 47.7 percent
Least Hard Contact Allowed (FanGraphs leaderboard)
League average = 34.8 percent
- Adam Ottavino: 25.3 percent
- Joakim Soria: 25.9 percent
- Tony Sipp: 26.3 percent
- John Axford: 26.4 percent
- Craig Kimbrel: 27.1 percent
- Justin Wilson: 28.4 percent
- Jeurys Familia: 28.6 percent
- Ryan Madson: 28.7 percent
- Zach Britton: 28.8 percent
- Zach Duke: 29.0 percent
No surprise, but Kimbrel figures prominently here. After enjoying yet another excellent regular season, during which he racked up 42 saves in 47 chances and posted a 2.74 ERA, the 30-year-old is poised to to sign one of the richest deals in the history of relievers. He’s joined by several other high-end options (Ottavino, Robertson, Familia and Britton, to name only a few) who should garner notable paydays on the open market. For teams that can’t afford the top relievers available, some of the less exciting names above may carry appeal as reclamation projects. Madson, for instance, had a horrid year with respect to run prevention (5.47 ERA in 52 2/3 innings), but he’s coming off a standout season in terms of velo, walks and weak contact. The 38-year-old also brings an impressive track record to the table.
