"Health certainly has a lot to do with it," Roberts said. "Starting pitching probably is the biggest difference. I don't know if you can attribute that to Buck or not."
Matusz (8-12) allowed three runs and five hits in six innings, beating the Yankees for the first time in four decisions against New York this season.
"You can't just walk over us, because we're playing good baseball right now," he said. "It's fun to come out and beat teams in our division."
Matt Albers, Jim Johnson and Koji Uehara finished, with Uehara pitching a perfect ninth for his seventh save in seven chances.
Burnett (10-13) lost for the fifth time in six decisions, giving up four runs, seven hits and four walks in seven innings. Burnett and CC Sabathia, New York's scheduled starter Tuesday, entered the series a combined 24-4 against Baltimore.
"You have to be able to shut them down after your team scores," Burnett said. "I wasn't able to do that."
Josh Bell doubled leading off the third, with Brett Gardner trying for an outstanding leaping grab in left-center only to allow the ball to pop free when his glove hit the field. Roberts, who went 3 for 5, singled and Felix Pie hit into a run-scoring double-play grounder.
Rodriguez's first homer in 12 at-bats against Matusz tied the score in the fourth. The drive off the back wall of the visiting bullpen in left-center gave Rodriguez 22 homers this season and 605 overall.
Roberts singled in runs in the fifth and seventh, around Matt Wieters' sacrifice fly in the sixth. The Yankees had tied the score in the sixth on Rodriguez's sacrifice fly and Robinson Cano's sun-aided pop single to left that that fell past Pie, the left fielder, and shortstop Cesar Izturis.
"I'm not going to make an excuse, but I can see how it happened," Showalter said. "I've seen it a lot here."
Notes: 3B Josh Bell made an excellent sliding pickup on Derek Jeter's grounder with runners on second and third, ending the fifth. Wieters threw out pinch-runner Greg Golson trying to steal second in the seventh. ... Orioles OF Adam Jones, out of the starting lineup since aggravating a left shoulder injury Wednesday, could return Tuesday. ... Roberts, who fouled a ball off a foot in the first, twice was thrown out trying for second on throws home.