The Red Sox and Cardinals agreed to a three-player trade on Tuesday that will send veteran starter Sonny Gray to Boston in exchange for right-hander Richard Fitts and lefty Brandon Clarke . The Cardinals are also expected to send $20 million to the Red Sox to help pay down Gray's salary.

As is always the case at CBS Sports, a notable trade means that I am here to offer near-instant analysis. That includes commentary on the involved players and their futures, as well as a letter grade that sums up each team's work.

Before getting to the analysis, here again are the full terms of the trade.

Red Sox receive : RHP Sonny Gray, $20 million

Cardinals receive : RHP Richard Fitts, LHP Brandon Clarke

Onward.

Red Sox grade: A

Here, the Red Sox not only leveraged their pitching

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