José de Jesús, 1991
You could be forgiven for forgetting about the tall, lanky de Jesús because of the passage of time and how bad the Phillies were when he was on the team, but he merits a mention. Signed by the Royals at just 18, de Jesús paid his dues working his way up their system (he was briefly Toronto property from the Rule 5 draft but was returned to KC) before finally appearing in two games for Kansas City in 1988 and then three games in 1989. Then, just before the start of the 1990 season, de Jesús came to the Phillies in a trade for noted home run hitter and future bounty hunter, Steve Jeltz.
Given a new lease on his career, the 25-year-old de Jesús started 22 games for the Phillies in 1990, and he was notably un-terrible, going 7-8 with a 3.74 ERA for Nick Leyva's 77-win ballclub. That's a high degree of difficulty, and de Jesús did not embarrass himself. But the best was yet to come.
In 1991 under new skipper Jim Fregosi, de Jesús took a regular turn in the rotation all year, amassing a 10-9 record to go along with a very nice 3.42 ERA over 181 2/3 innings. He even twirled three complete games. He also led the National League in walks, but we'll ignore that part, as he was effectively wild. Unfortunately, though, his success stopped right there.
Injuries kept de Jesús on the shelf for the entirety of 1992, and he spent all of 1993 trying to ramp up in the minors for the Phillies. At the end of that season, his contract ran out, the Phillies made no effort to bring him back, and he reunited with the Royals for all of five games in 1994.
He never saw the majors again after that, bouncing all over the minors, including a brief stint with the Atlantic City Surf during their inaugural season in 1998. It's a shame that de Jesús could never really build on his success from 1991, but it makes him a prime candidate for this kind of list.