The Rays designated Acton for assignment Monday.
Acton made one scoreless appearance for the Rays in 2025 but spent virtually all of his time at Triple-A Durham, where he held a 3.68 ERA and 71:27 K:BB over 58.2 frames. The 27-year-old is no longer on the 40-man roster but could stick around in the organization if he passes through waivers.