Don't sleep on, or with, Rusney Castillo. The Sox signed him in August, 2014 for $72.5 mm.
Castillo put up good numbers, albeit in short seasons, in Cuba in 2010-11and 2011-12. He then saw his numbers decline -- his batting average was .274 for example -- in 2012-13 and he missed almost all of 2013-2014 until the Sox signed him due to injury.
So off a few strong seasons in Cuba, which is effectively a AAA comp, and a down year and a year in which he didn't play, the Red Sox gave him an enormous contract.
Trying to catch the Cuban wave or some such thing.
We all saw the results and his inability to stick with the team.
At least guys like Sandoval and Crawford had enjoyed some success in the majors and at least whatever success they did enjoy wasn't so limited.
His numbers:
https://www.baseball-reference.com/register/player.fcgi?id=castil000rus