The Red Sox will send John Lackey to the mound on Tuesday night at Coors Field. He will be opposed by Rockies right-hander Tyler Chatwood. Jake Peavy will be the Red Sox starter on Wednesday night against veteran Roy Oswalt. Both games will start at 8:40 p.m. Eastern Time. After the brief two-game set, Boston will head to Camden Yards for the final three games of the season.