The Cleveland Indians added to their already dominant bullpen on Thursday as the team signed left-hander Boone Logan to a one-year contract. Logan had spent the 2016 season with the Colorado Rockies.

Logan’s contract is worth $5.5 million for the 2017 season and includes a 2018 club option that is worth $7 million. The option has a $1 million buyout.

Logan, age 32, will join the likes of Andrew Miller, Bryan Shaw, and Cody Allen in a frightening Indians bullpen that marched its way the World Series in 2016.

In 2016, Logan put up solid numbers for the Rockies, pitching to a 2-5 record in 66 games, acquiring an ERA of 3.69 and recording 57 strikeouts across 46.1 innings of work. His K/9 mark of 11.1 made it the fifth season in a row in Logan’s career that his K/9 mark was over 11.0.

What makes Logan so intriguing was his dominance at Coors Field in 2016. In 33 games at Coors Field, Logan posted an ERA of 2.35 across 23 innings of work and struck out 30 batters while walking just 10. Away from Coors Field, Logan posted an ERA of 5.01.

Logan is also known for dominating left-handed hitters, as he boasts a career slash line against of .233/.308/.361 and a strikeout-to-walk ratio of 3.56.