No. 10 Garrett Custons, C
Custons joined the Jays from his collegiate Air Force Falcons, where he functioned as a triple threat as he dominated at the plate, on the bases and behind the plate.
Custons wound up playing in just 17 games for the Jays in Rookie Ball, reigstering 12 hits in 54 at-bats, good for a .222 batting average. On defense, he threw out eight of 15 attempted runners, good for a 35% CS rate.
All signs point to his departure from the Blue Jays organization being because of his drive to return to the Air Force. A quick Google search brings up his Linkedin account, where it says he immediately became a Budget Analyst for the Air Force after his leaving professional baseball.
No. 9 Chad Girodo, LHP
Girodo excelled in the minors for Toronto, posting a 4.18 ERA in his first 14-game cameo in 2013 followed by a 2.47 ERA performance the next season and a 1.34 ERA showing the next.
On the fast track to the bigs, he made it all the way up to Triple-A in under two full years. His big league debut came in 2016 for the Blue Jays and wound up being his only action in the majors to date. In 14 games, he posted a 4.35 ERA across 10.1 IP to go along with an ERA+ of 101.
After signing a minor league deal with the Dodgers in 2017, he latched on with the independent Chicago Dogs in July of 2018 before being released by the club in April of 2019, seemingly retiring from the game after that.
No. 8 Kendall Graveman, RHP
Graveman is another one that zoomed through the farm system, making his big league debut in 2014, just one year after his being drafted in the eighth round.
A starter in the minors, Graveman made five relief appearances for the Jays before being a part of the huge package going from Toronto to Oakland in the Josh Donaldson deal in November of 2014.
His brief Blue Jays career was solid, allowing two earned runs in 4.2 IP, good for a 3.86 ERA but his career has really taken off since. Last year as a member of the White Sox bullpen, Graveman made 65 appearances of 3.18 ERA-ball, good for an ERA+ of 125.
No. 7 Conner Greene, RHP
Greene is yet another example of relatively high draft picks who failed to reach the big leagues for the Jays. Before being traded to the Cardinals for Randal Grichuk in 2018, Greene functioned as a middle-of-the-pack starting pitcher who didn't quite show enough to earn a promotion but was serviceable enough to be kept around.
He finally broke into the big leagues in 2021 with the Orioles and Dodgers, posting a 7.11 ERA in 24 appearances, walking 12 and striking out 26 in 25+ innings.
Currently, Greene is under contract with the Diablos Rojos del México of the Mexican League as he looks to rebuild his stock and take another crack at Major League Baseball.
No. 6 Matthew Boyd, LHP
Knowing what you know now about Matt Boyd, is he a pitcher the Jays should've held on to longer? The honest answer is, I'm not sure.
Of course, if the club elected to hold on to Boyd, they would've never ended up with David Price, who put the team on his back after coming over via trade with the Detroit Tigers.
After being one of the most dominant pitchers in the minor leagues in both 2014 (1.39 ERA in 16 starts, 103 strikeouts and 20 walks) and 2015 (1.65 ERA in 19 starts, 108 strikeouts and 27 walks), he broke into the bigs with the Jays but just couldn't capitalize on the opportunities.
He's had an up and down career since with both the Tigers and Mariners but in the past few seasons he's rebuilt his value quite a bit and just recently earned a $10M contract from Detroit.