3. Seranthony Dominguez
Dominguez walked a tightrope all season long, especially in the playoffs. Despite allowing 9 baserunners in 5 1/3 innings in the postseason, he wasn't charged with a single earned run.
That type of good fortune is not sustainable going forward, however. He went 5-5 with a 3.78 ERA this season (considerably higher than his 3.00 ERA in 2022), and his numbers are trending in the wrong direction.
Dominguez's 4.84 FIP and 1.40 WHIP were terrible for a relief pitcher, and his ERA will certainly be over four (if not five) next year if he doesn't improve. He also posted the worst strikeout rate of his career at 8.6 K/9, so he appears to be losing his stuff as he approaches his age-29 season.
The veteran reliever is heading into his final year before free agency, which makes this winter the perfect time to shop him around. His salary is going up from $2.5 million to $4.25 million as well, so the Phillies could save some money by dealing him for prospects or a cheaper reliever.
With Dominguez's performance likely headed for regression in 2024, Philadelphia should try to sell relatively high on him while it still can.