Crawford's missed tag on Chris Young was indeed costly and came after the reigning Gold Glove shortstop appeared to make a sparkling defensive play on pinch-hitter David Ortiz's high chopper over the mound.
"That's what you're hoping for, a ground ball, and we got it," Giants manager Bruce Bochy said. "[Young] just avoided the tag. That's a tough break there. I couldn't tell if he was out of the line or not, but we didn't get the tag on him and they scored."
Boston's Jackie Bradley Jr. got the inning started with a one-out walk against San Francisco starter Albert Suarez. Bradley stole second and kept going to third when backup catcher Trevor Brown's throw went into center field.
Young also walked before Ortiz, pinch-hitting for Christian Vazquez, hit the first pitch he saw from reliever Javier Lopez back up the middle for what looked to be an inning-ending double play.
Crawford fielded the ball cleanly and ran toward Young, who had slowed down between first and second, but barely missed the tag as Young dove under Crawford's glove. As Crawford threw to first, Bradley scored to tie the game at 3 as Young raced to second.
"That's an instinctive play," Young said. "I saw by the way he fielded it he wasn't going to be able to touch the base, so I just stopped in my tracks and figured I'd get in a rundown or avoid the tag any way I could. I was in panic mode and thought, 'Just get to the ground as fast as possible.'"
Michael Wagaman is a contributor to MLB.com and covered the Giants on Tuesday. This story was not subject to the approval of Major League Baseball or its clubs.