Critics might bash Rivera's performance, as the loss gave the Red Sox sole possession of first place in the AL East.
However, Mo's blow wasn't the driving factor in the Yankees' loss—it was the lack of hitting.
Gathering eight hits against Josh Beckett isn't terrible, but scoring just two runs is.
Their swings were flat and untimely while the pitching was fantastic in allowing just two runs in the first nine innings.
So, what's the solution?
The best option looks to be calling up their top-prospect catcher, Jesus Montero.
Montero, a 21-year-old Venezuelan, was signed by the Yankees in 2006, and has been playing with their Triple-A affiliate, the Scranton/ Wilkes-Barre Yankees, for the past two seasons.
According to Baseball America, Montero was ranked third amongst prospects across the nation before the 2011 season.
Here are four reasons that should convince the Yankees to promote their budding star.