Buck Showalter meets with the media following the O's 5-2 win over Boston
Matusz, who walked one and fanned six, improved to 2-0, 2.55 on the year in four starts vs. Boston. Red Sox batters have hit just .200 against him this year.
Matusz has an ERA of 2.43 over his last six starts, all coming this month.
Marco Scutaro's key throwing error with two outs in the third led to two O's runs and a 3-0 lead. Lowrie's blast cut the lead to 3-2.
The O's got key outs from their bullpen over the seventh and eighth frames to maintain a one-run lead. It stayed that way until Scott and Felix Pie homered off Felix Doubront in the last of the eighth for a 5-2 edge.
Losing pitcher Josh Beckett gave up three runs and seven hits over seven innings, falling to 4-4, 6.27.
The O's have won four in a row, allowing just three runs in that time. They took the season series lead 7-6 over Boston after going 2-16 vs. the Sox last year.
They ended the month of August with a record of 17-11.
In game two of this series on Wednesday night, it's Jake Arrieta (4-6, 5.10) vs. Jon Lester (13-8, 3.26). Lester is 12-0, 2.00 in 15 career starts vs. the Orioles.