MLB Roster Expansion and Fantasy Baseball Prospects for September 2026

With September approaching, Major League Baseball rosters will increase from 26 to 28 players, creating opportunities for various fantasy baseball prospects. This expansion, although smaller than in previous years, could lead to promotions as teams seek to enhance their rosters during the playoff push.

Joshua Baez recently made his debut, being the only player promoted from last week's list. Kade Anderson continued to impress with a strong performance, throwing 5.2 innings with only two hits allowed, and could be a valuable addition for Seattle as they remain in the playoff race. Meanwhile, Charlie Condon is experiencing a slump, but his potential power keeps him on the radar for fantasy managers.

Walker Jenkins is making a case for promotion with a solid batting average and home run production, while Michael Arroyo has shown versatility and power since moving to Triple-A. Ethan Salas is also performing well, but faces competition for playing time. James Tibbs III has been on a hitting streak, making him a candidate for a September call-up. Other prospects like Brendan Beck and Joseph Dzierwa are also worth monitoring as the season progresses.