Miami Marlins catching prospect Joe Mack has held his own during his first look at the Triple-A level. Mack was promoted to Triple-A Jacksonville earlier in April. Through his first 10 games at the top level of the minor leagues, Mack has posted a .270/.372/.486 slash line with two doubles and two home runs. He has held an 11:5 K:BB, tallied three RBI, and scored five runs. Earlier in the campaign, Mack held a .318/.464/.614 slash line at Double-A. Last season, the No. 9-ranked prospect in the Miami system posted a .241/.322/.456 line across 112 games at Double-A. Fantasy managers should continue to monitor his progression as he could eventually earn a promotion to the majors later in the season. However, with Agustin Ramirez now in Miami, Mack will likely only see a part-time role when he earns the call.

The Miami Marlins have promoted catching prospect Joe Mack to Triple-A Jacksonville. Mack is considered the No. 9-ranked prospect in the system on MLB.com. The 22-year-old spent most of the 2024 campaign at Double-A and needed just 13 games at that level this season to prove he was ready for the top level of the minor leagues. This promotion is coming just one day after the Marlins promoted fellow catching prospect Agustin Ramirez to the big leagues. Mack will likely take his spot as the top backstop in Jacksonville. Across 13 games with Double-A Pensacola this season, Mack posted a stellar .318/.464/.614 slash line with four doubles and three long balls. Last summer at Double-A, Mack held a .241/.322/.456 line with 22 home runs across 112 games. He is a name to keep a close eye on as he could push for a second-half MLB debut.

Miami Marlins catching prospect Joe Mack went 3-for-4 with a double and a home run during Tuesday's contest against Double-A Montgomery. Mack tallied just one hit (a single) over his first two games of the campaign. This was a nice breakout outing for the 22-year-old. Last summer, Mack spent a majority of the campaign at the Double-A level and held a .241/.322/.456 slash line. Across 112 games, Mack went deep 22 times and added 25 doubles. He held a 46:122 BB:K and swiped two bags. Given his previous success at Double-A, fantasy managers should expect the Williamsville East HS product to push for a Triple-A debut later this summer. If he continues to hit for power, the No. 9 prospect in Miami could open the door for a late-season MLB debut.