Joe Jones - RHP
Jones was released by the Red Sox in July after posting a 3.86 ERA across 11 outings to kick off the year. Just four days later, the Blue Jays picked him up and assigned him to Double-A New Hampshire. He made 14 appearances for the Fisher Cats but struggled; posting a 5.89 ERA with 12 earned runs and 12 walks in 18 innings of work.
Matt Wisler - RHP
Easily the most decorated player on this list, Wisler signed a minor league deal with the Blue Jays back in August. He made 54 appearances this year split between the Tigers and Jays organizations with a 4.60 ERA and 73 strikeouts in just under 63 innings. 2023 was the first year since he debuted in 2015 that he did not make a single appearance in the big leagues.
Roither Hernandez - RHP
The 25-year-old Hernandez has not made a single professional appearance since back in 2021. When healthy, he's shown some glimpses of promise at times, but that's been the exact issue - he can't get healthy.
Jol Concepcion - RHP
Concepcion, 25, made just 4 appearances this year and they were not pretty. In 5.1 innings, he walked 6 and surrendered 7 earned runs on as many hits. He spent the majority of the year on either the Development List or 60-day injured list and could conceivably be brought back on another deal when healthy.
Zach Thompson - RHP
Thompson came over to the Blue Jays via trade with the Pittsburgh Pirates this past offseason. He was on the Jays' 40-man roster for a while, but lost his spot during the season and had his fair share of struggles down in Buffalo. The 6-foot-7 righty made 25 starts in the minors this year, going 6-6 with a 4.49 ERA in 108 innings. He is a solid depth piece and should easily be able to find a new home this offseason on any team looking for depth starters.