February 21, 2023 1:36 pm MLB Rule Changes 2023: Bigger Bases The size of bases will be increased from 15 inches to 18 inches for 2023. Here are some benefits to this MLB rule change Celtics Videos 1:54 How do the Patriots feel about Drake Maye & J.J. McCarthy? 1:38 O'Neill placed in concussion protocol after collision with Devers 0:36 Emotional Trevor Story talks about season-ending injury 0:40 Breslow: Trevor Story to undergo season-ending shoulder surgery 1:21 Cora: Wakefield a World Series champion and a ‘champion of life'