Hardest throwers in MLB for 2015

It's not surprising to see Chapman lead the list. His elite velocity from the left side has helped him become arguably baseball's most dominant reliever, posting a 1.63 ERA and 33 saves last season. He's likely to serve as the Yankees' closer this season.

Herrera has helped make up one of the top bullpens in baseball with the Royals and has brought serious velocity since he became a regular member of the team's pen in 2012. He has a career 2.60 ERA in 279 appearances.

Rosenthal has a combined 93 saves over the last two seasons for the Cardinals and a 2.66 ERA in 233 career appearances. His 11.5 strikeouts per nine innings shows a reliever as dominant as his velocity.

Caminero broke on the scene with the Pirates last season, going 5-1 with a 3.62 ERA and finishing 19 games. He had 73 strikeouts in 74.2 innings.

Vizcaino emerged late last season as Atlanta's closer, proving that his arm was finally healthy following Tommy John surgery. He had a 1.60 ERA and nine saves in 36 appearances.

The enigmatic Rondon saw time as Detroit's closer late last season but was sent home before the conclusion of the season for quitting on his team. His arm still shows a bright future, with 36 strikeouts in 31 innings in 2015.

Capps will compete with A.J. Ramos this spring for Miami's closer role. The hard thrower has struggled with injuries during his short career, but he had an incredible 58 strikeouts in 31 innings last season.

Kimbrel needs no introduction as one of the most dominant relievers in the game, with a 1.63 ERA and 225 saves over six seasons. He was traded from San Diego to Boston during the offseason and will close for the Red Sox this season.

Familia emerged as one of baseball's best closers last season, posting a 1.85 ERA and 43 saves for the Mets. He also had more than one strikeout per inning.

A former minor league closer, Diaz was an important piece of Cincinnati's bullpen last season with a 4.18 ERA and 10.4 strikeouts per nine innings. The "jumbo" reliever will compete for Cincinnati's closer job this spring after the team traded Aroldis Chapman.

Adams struggled with his command for the Indians in his rookie season, but he did bring the velocity. He posted a 3.78 ERA in 33.1 innings.

Betances' multi-inning appearances have been frequent for the Yankees, making him an incredibly valuable setup man. He had a 1.50 ERA and nine saves in 84 innings last season, along with 14 strikeouts per nine innings.

Strickland arrived to the Majors late in 2014 with nine scoreless appearances, and last year he picked up where he left off. He had a great year with a 2.45 ERA and nearly one strikeout per inning in 51.1 frames for the Giants.

Ellington had a breakout year in 2015 and posted a 2.88 ERA in 23 appearances for the MLB portion of his season for the Marlins. He struggled with his control but was very effective early in the season in Double-A.

Always a hard thrower, Eovaldi's issue as a Major League starter has been developing secondary stuff that can miss bats. He went 14-3 with a 4.20 ERA in 27 starts for the Yankees last season and also showed some improvement with 7.1 strikeouts per nine innings.

Just one of the Mets' aces, Syndergaard finished fourth in the NL Rookie of the Year voting after going 9-7 with a 3.24 ERA in 24 starts. He had an incredible 5.35 strikeout-to-walk ratio and 10 strikeouts per nine innings.

Baez was a great middle reliever for the Dodgers last season, with a 3.35 ERA and 10.6 strikeouts per nine innings in 52 appearances. His excellent command makes him a candidate to close if Kenley Jansen needs relief.

Hunter has pitched between setup and closer roles since 2013. He doesn't show great strikeout numbers despite his velocity but has been effective with a 3.26 ERA over the last three seasons.

Romero remains a project for the Rays as he works on his control. He had a 5.10 ERA in 30 relief innings for Tampa Bay last season.

Treinen had trouble throwing strikes for the Nationals last season, with a 3.86 ERA and 32 walks in 67.2 innings. He found more success as a swingman for the team in 2014.

Giles was terrific as Philadelphia's closer last season after the team traded Jonathan Papelbon, posting 15 saves with a 1.80 ERA and 11.2 strikeouts per nine innings for the year. Houston traded for Giles in the offseason.

Diekman profiles as more than just a lefty specialist, with a career 11.3 strikeouts per nine innings. His ERA went above 4.00 between Philadelphia and Texas last season due to his control issues.

Britton's sinker is perhaps the most dominant pitch in baseball, with incredible velocity and sink from the left side. He's posted a sub-2.00 ERA in consecutive seasons and made his first All-Star appearance in 2015. Baltimore's closer has recorded 73 saves over the last two years.

Ventura was a big part of Kansas City's World Series squad with his late-season push. The former top prospect went 13-8 with a 4.08 ERA in 28 starts and nearly one strikeout per inning.

It was great to see Hudson healthy for a full season after two Tommy John surgeries. The former starter pitched as Arizona's setup man last season, posting a 3.86 ERA and more than one strikeout per inning in 67.2 innings.