Santana went 0-for-6 with a strikeout in Monday's 8-6 extra-innings loss to the Yankees.
It's rare for the first baseman to fail to get on base in some way -- he has a .341 on-base percentage and 14.6 percent walk rate this season. Santana has gone 10 games without a multi-hit effort, going just 5-for-38 (.132) with six walks and three runs scored in that span. All five hits in his slump have been singles.