Roy Oswalt was scratched from his scheduled start due to back stiffness, so Scott Feldman will oppose Felix Doubront in the opener of the Texas Rangers' three-game series against the Boston Red Sox at 7:05 p.m. on ESPN Dallas 103.3 FM and ESPN. A quick look at the matchup:

Feldman (3-6, 5.89 ERA): Has not faced the Red Sox this season. ... His only other career start against Boston came in 2008 when he allowed 12 runs (six earned) and 10 hits in 2 2/3 innings at Fenway Park. ... Feldman earned the win in his last outing, throwing two scoreless innings against the Minnesota Twins on July 8. ... Did not factor in the decision in his previous start against the Chicago White Sox on July 4. ... Has a 6.46 ERA as a starter.

Doubront (10-4, 4.24 ERA): The left-hander will face the Rangers for the first time this year. ... First Boston pitcher to get to 10 wins. ... Doubront tossed six innings of one-run ball in his last outing, beating the Chicago White Sox last Wednesday. ... He is 5-1 with a 3.09 ERA on the road this season.

Hitters: Nelson Cruz is 2-for-3 with a double off Doubront. ... Josh Hamilton is 2-for-4 with a triple and three RBIs. ... Ian Kinsler and Michael Young each have a hit against Doubront. ... Ryan Sweeney is 8-for-19 (.421) with a home run, four doubles and eight RBIs against Feldman. ... David Ortiz is 2-for-6 with two home runs, but he's on the disabled list. ... Mike Aviles is 4-for-9 with a home run and a double off Feldman.

Up next:

Tue vs. Bos.: TBD vs. RHP Clay Buchholz (8-3, 5.19 ERA), 7:05 p.m., ESPN Dallas 103.3 FM/1540 AM/FSSW
Wed vs. Bos.: LHP Derek Holland (6-5, 4.84 ERA) vs. RHP Josh Beckett (5-8, 4.53 ERA), 7:05 p.m., ESPN Dallas 103.3 FM/1540 AM/FSSW