The Red Sox promoted Eyanson from High-A Greenville to Double-A Portland on Sunday, Ari Alexander of 7 News Boston reports.
Eyanson will make the leap to the Double-A level after dominating to the tune of a 0.44 ERA, 0.50 WHIP and 34:3 K:BB in 20.1 innings spanning five starts with Greenville to open the season. The No. 87 overall pick in the 2025 First-Year Player Draft, Eyanson, 21, is quickly establishing himself as one of the top pitching prospects in the Red Sox organization.