De La Rosa allowed five runs on six hits while striking out two in four innings in Saturday night's loss to the Royals. He failed to get a win for the sixth straight start and has one victory in his past 10 starts.
Betts made his first start at second base in the major leagues Saturday and is expected to remain there for the balance of the season, ESPN Boston reports. "As much as I said before about not moving him out of center field, here we are putting him at second base," manager John Farrell said. "I want to minimize the back-and-forth to him. In fairness to him, that would be the approach. It kind of points at Mookie remaining at second base."
Buchholz made another quality start Thursday, giving up three runs -- two earned -- and six hits in 6.1 innings at Kansas City. He issued three walks and struck out seven en route to his eighth win of the season.
Updating a previous report, Holt (neck, illness) did not travel with the Red Sox to Kansas City, suggesting he'll be unavailable for the entirety of the four-game series between the two squads, Brian MacPherson of the Providence Journal reports.