No. 1 MLB Draft Picks Since 1985 - Sports Illustrated
Looking past the stat line: Mark Appel, RHP, Astros - Minor League Ball
Former No. 1 pick Mark Appel gets MLB call-up 9 years after being drafted
Mark Appel elated after callup to Phillies
Is Mark Appel going to get an MLB game with the Phillies? - AS USA
Mark Appel long path to Phillies bullpen
Appel signing another shrewd move by Astros, who are rebuilding the right way - Sports Illustrated
Appel fails to sign; no teams lose future picks
Mark Appel Phillies MLB debut Angelo Cataldi 94WIP
Philadelphia Phillies call up former Houston Astros first overall pick Mark Appel
MLB DRAFT: Astros take Stanford pitcher Mark Appel at No. 1
Mark Appel makes it to the MLB 9 years after being No. 1 pick
Mark Appel The Fifty Most Interesting Athletes
15 years of No. 1 overall picks in the MLB Draft: Where are they now? - MLB Daily Dish
Mark Appel was once a can't-miss prospect. Nine years later, the Phillies could finally make him a major leaguer.