Alexander is a 28-year-old right-hander who hails from Lake Jackson, Texas. He attended Brazosport Christian School where he was first-team all-state in baseball, football and basketball. Earning a spot in the Texas All-Star game.  

The right-hander went to Blinn Junior College and pitched his way to the JUCO All-Star team. Alexander would finish out his college career at the University of Texas-San Antonio (UTSA), where he pitched in 9 games which 7 were starts, penciling in a 3.19 ERA and struck out 30 batters.  

In the 2018 MLB draft the Miami Marlins selected Nate Alexander in the 24th round. The hard-thrower pitched two seasons in the Marlins system and in 46 games he had a 3.04 ERA and punched out 65 hitters. Alexander joined his first MLB Partner League team in 2021 with the New Your Boulders of the Frontier League, and spent 22-23 in the Pioneer League with two different clubs.  

Last season Alexander was named the bullpen ace of the RailCats. Lamarr Rogers brought him out of the bullpen 47 times, he finished 40 games recording seven saves. The closer had a 3.96 ERA by the end of the year with 65 strikeouts and just 29 walks. Alexander was named to the Mid-Summer Classic alongside Josh Smith.