The Cubs got a real answer from the left side of their bullpen in 2026, but the way forward still feels shaky if they simply bank on Ryan Rolison to repeat it.
Rolison was one of the minor-league bets Chicago took last offseason, and it paid off. After Hoby Milner and Caleb Thielbar struggled, Rolison ended up as Craig Counsell’s best left-handed bullpen option. He finished the year with a 3.14 ERA in 60 appearances and struck out more than 21% of the hitters he faced.
That’s a useful season, no question. But it also comes with some warning signs.
Rolison’s first year of arbitration arrives this offseason, and the Cubs have him under control through 2029. Even so, the numbers underneath the surface suggest there could be some pullback in 2027.
His xERA sat at 4.03, and his xFIP came in at 4.24.
That’s why Chicago would be smart to add another lefty with a more established track record instead of asking Rolison to carry the role again.
One name that fits is Alex Vesia.
The Dodgers reliever is a pending free agent, and he checks a box the Cubs have too often been missing in recent seasons: a left-handed arm that can miss bats at a high rate. Vesia owns a career strikeout rate of 32.4%, which puts him among the better strikeout relievers in the game.
He’s not the same kind of lefty the Cubs have leaned on before, either. Thielbar did strike out hitters in 2026, but he also gave up too many home runs.
Vesia allowed just 0.62 home runs per nine innings this season, and he doesn’t rely on an unusual delivery to get results. That could make him a cleaner fit and a better immediate upgrade than Milner, who was released in September.
And with so many moves still likely needed on the pitching staff, Vesia looks like the sort of under-the-radar target Chicago should be circling.
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