The Miami Marlins have one of the best pitching prospects in baseball in left-hander Thomas White and he’s closing in on the Majors.

According to MLB Pipeline, he is the Marlins’ No. 1 prospect and the No. 22 prospect in baseball. He just turned 21 and he’s coming off the best season of his minor league career, one that saw him play for three different affiliates.

With High-A Beloit, Double-A Pensacola and Triple-A Jacksonville, he went 4-3 with a 2.31 ERA in 21 games, all starts. He allowed just 25 runs (23 earned) in 89.2 innings. He struck out 145 and walked 51 and allowed batters to hit a career-best .174 against him. He also had a career-low 1.18 WHIP.

But one number stood out last season, one that gives Marlins fans a glimpse of the pitcher he could be when he reaches the Majors, perhaps as early as 2026.

Thomas White’s Big Number