I wrote recently about how Brad Keller‘s improvement since joining the Cubs has him in line to be their closer, but he’s not the only reliever who has made significant strides via the pitching lab. Caleb Thielbar had a 5.32 ERA and a 1.56 WHIP with the Twins in 2024, both the worst marks of his career in a full season. While he had put up better numbers in the past, we’re still talking about a 38-year-old journeyman who spent over a decade bouncing between five MLB organizations and the then-independent St.
Caleb Thielbar Has Established Himself as Another Successful Cubs Bullpen Project
