Red Sox fire pitching coach Juan Nieves

The Red Sox entered this season with plenty of questions about their pitching, and so far, none of them have been answered. The club fired pitching coach Juan Nieves Thursday afternoon as a result.Nieves joined the Red Sox in 2013, when the team went on to win the World Series. Last year didn't go nearly as well, but pitching wasn't the problem. MORE: Ranking the American League uniformsA month into the 2015 season, the Sox have posted a 4.86 ERA, second-worst in baseball to the Rockies. This winter, Boston made a handful of big moves by signing Hanley Ramirez, Pablo Sandoval and Cuban prospect Yoan Moncada, all position players. They acquired righty Rick Porcello from the Tigers, lefty Wade Miley from the Diamondbacks and signed righty Justin Masterson to patch up the rotation.The Red Sox entered this season with a shaky starting five, its success contingent on Joe Kelly taking a big step forward and Clay Buchholz returning to form, among other things. It hasn't happened, so Nieves is gone.Now, they're without a pitching coach and a top-end starter. Despite these t-shirts the staff wore during spring training, the Red Sox still don't have an ace.Here is Wade Miley modeling new t-shirts— Rob Bradford (@bradfo) March 5, 2015Nieves spent nine years as a minor league pitching instructor with the White Sox, then served as the team's bullpen coach for five seasons before joining the Red Sox. He pitched fo

r the Brewers from 1986-1988.