4. Corey Kluber: Retirement
Seriously, who would sign this guy?
Corey Kluber is a two-time Cy Young winner, but he's clearly not that guy anymore. His performance has declined pretty dramatically over the past few seasons, and in 2023 the bottom finally fell out.
The three-time All-Star was signed to help replace Nathan Eovaldi, Michael Wacha and Rich Hill, and he was even tabbed as Boston's Opening Day starter. Unfortunately, he turned out to be completely ineffective as both a starter and a reliever. In 15 appearances for Boston (9 starts), he went 3-6 with a 7.04 ERA, a 7.11 FIP and a 1.64 WHIP.
Kluber didn't pitch at all during the second half of the season due to injury, sparing the Red Sox several more horrific performances. At 37, he's clearly toast and appears to be at the end of the line.
Kluber's had a fine career and was one of the best pitchers in baseball at his peak. But he hasn't been a truly great pitcher in 2018, and now he can't even be an innings-eater or a decent reliever. He had a good run, but it's time for him to call it quits.
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