Colorado Rockies: A look at some of the relievers on the free agent market this offseason

Mark Melancon
Mark Melancon, 36, isn’t as good as he once was since he is a three-time All-Star and an All-Star most recently in 2016, but he still has been an excellent reliever in the past few seasons.
Melancon, the local product who’s a graduate of Golden High School in Golden, Colorado, has pitched in 130 games in the last three seasons and he has an ERA of 3.35. His FIP is even better at 3.17 and an ERA+ of 128. His WHIP is a tad high at 1.395 but his home run rate is only 0.5 per nine innings and he strikes out 7.9 batters compared to only 2.7 walks per nine innings in that span.
He has extensive closing experience as well as he has more than 200 career saves, including 23 in the last two seasons.
Oliver Perez
Oliver Perez, who will turn 40 in August, has been a key cog in the Indians bullpen for the last three seasons. The left-hander has an ERA of 2.67 in the three seasons with 139 games with an ERA+ of 173. His FIP was 2.83, his WHIP was 1.022, and he has had more than ten strikeouts and only 2.5 walks per nine innings.
Yusmeiro Petit
Yusmeiro Petit, 36, has been a key for the Oakland A’s bullpen since 2018 and he has been excellent in all three seasons he has been with them.
In 180 appearances, he has an ERA of 2.73 (154 ERA+) with a FIP of 3.80. His WHIP in that span is 0.936 with a strikeout-to-walk ratio of 5:1.