For a pennant winner, that bullpen was pretty bad -- the top five relievers in games pitched had ERAs hovering at 4 or worse (and as we know, that doesn't account for inherited runs allowed). Schiraldi getting called up at the end of the summer basically saved the season, and he was good in the LCS... but as we know, burned out in the WS.
But you're right, Crawford was a postseason hero and the only Red Sox besides Hurst to win a World Series game. His scariest moment came in the bottom of the 9th in LCS Game 5 vs. the Angels with the pennant-winning run on 3rd, one out, and clean-up batter Doug DeCinces up. He popped up to right and the run didn't score.
After the game, which Boston won, 7-6 in extras, California Manager Gene Mauch said, "I have nowhere to sleep tonight. I bet my house DeCinces would get that run home."