20. Jorge de la Rosa

In the thin, unforgiving air of Denver, Jorge De La Rosa achieved what many thought impossible: he became a consistent winner in a ballpark built for hitters. Arriving in 2008 as a left-hander with a power arsenal and a checkered injury history, the Monterrey native developed into the most statistically successful pitcher to ever call Coors Field home. While the "altitude tax" broke many of his peers, De La Rosa utilized professional resilience and a devastating split-finger fastball to anchor the rotation for nearly a decade, eventually leaving as the franchise’s all-time leader in wins and strikeouts.

De La Rosa’s stay in Colorado was defined by a remarkable ability to neutralize the home-field disadvantage. He established a level-headed consistency at 5,280 feet, finishing his tenure with the best winning percentage in the history of the park. He was a model of high-frequency production, four times exceeding double-digit wins and reaching the 16-victory mark on two separate occasions (2009 and 2013). During those years, he was a tactical engine of the rotation, twice finishing third in the National League in wins and providing the high-leverage durability required to lead the staff through the grueling summer months.

The most impressive aspect of his craftsmanship was how he balanced high-volume strikeout numbers with a gritty, workmanlike approach. De La Rosa moved past several franchise legends to secure his place as the organization's career wins leader (86) and, for a time, its strikeout king with 985 punchouts. He possessed a specialized, heavy delivery that generated swings-and-misses when the club needed them most, serving as the primary anchor for the 2009 squad that charged into the postseason. Even after a major injury in 2011, he returned with a focused intensity that saw him post some of the best efficiency numbers of his career, proving that his value was built on more than just raw velocity.

His run in Colorado concluded after the 2016 season as he transitioned to a relief role in Arizona and Chicago.  The ultimate punctuation on his career arrived in 2025, when he was inducted into the Mexican Professional Baseball Hall of Fame.