Luis Guerrero has been promoted to the Red Sox roster as one of the team's top pitching prospects. The hard-throwing right-hander, ranked No. 28 in Boston's system, has demonstrated strong performance at Triple-A Worcester, recording a 3.31 ERA and 79 strikeouts over 54.1 innings. Notably, he has not allowed a run in his last nine outings, striking out 22 over 12.1 innings. Guerrero will wear No. 99 with the team as he aims to contribute to reversing the Red Sox's current losing streak.