Lightly regarded Mystik Dan scored a mild upset at the Kentucky Derby on Saturday, bringing a career Triple Crown to trainer Kenny McPeek.

Mystik Dan came into the Derby with a relatively thin résumé that included a third-place finish at the Arkansas Derby and win at the Grade III Southwest Stakes.

It was the first Derby triumphs for McPeek and rider Brian Hernandez Jr. McPeek had previously trained filly Swiss Skyliner, the 2020 Preakness States champion, and Sarava, longshot winner of…