You don't need to call anything a good decision just because the results are good. His decision lowered the chances of success (winning), but a bad decision does not mean you are guaranteed to fail. Total guesstimation, but say before the walk, the Rays had a 15% chance of giving up 4 or more runs and, after the walk, that was raised to 20%. Still a bad decision, but a wide window of success. Edit: Logan did my homework. Chance of winning dropped 5.2%, down to 89.8%. Bad decision with high likelihood of success.