To make room on the Boston Red Sox's 40-man roster after the signing of outfielder Masataka Yoshida, the team designated infielder Jeter Downs for assignment on Thursday. Once a top prospect that was acquired in the blockbuster trade that sent outfielder Mookie Betts to the Los Angeles Dodgers, Downs' stock has taken a major hit. The 24-year-old shortstop has hit under .200 in each of the last two years at Triple-A Worcester, and he slashed .197/.316/.412 with 16 home runs, 33 RBI, 56 runs ...