Chris Davis and J.J. Hardy homered off struggling Phil Hughes (1-4), giving the Orioles their first win in five tries against the Yankees this year.
Showalter, whose first win came 20 years ago across the street at old Yankee Stadium when New York's Scott Sanderson beat Boston ace Roger Clemens, improved to 1,000-958 in 14 seasons with the Yankees, Arizona, Texas and Baltimore. He joined Dusty Baker, Bruce Bochy, Davey Johnson, Jim Leyland, Mike Scioscia and Bobby Valentine among active managers in the 1,000-win club.
Matusz (1-3) allowed six hits in 6 1-3 innings to win for the first time since beating Oakland last June 6. He had been 0-12 with a 10.47 ERA in 14 starts since, the longest active losing streak in the majors and one short of the Orioles record set by Mike Boddicker from 1987-88.
BLUE JAYS 8, RANGERS 7
TORONTO (AP) — Brett Lawrie homered leading off the ninth inning to give Toronto a comeback victory over Texas.
Francisco Cordero blew a save opportunity in the top of the ninth, but Lawrie, fromlangley, B.C., won it in the bottom half against Mike Adams (0-1) with a shot that bounced off the top of the wall in left-centre, his third.
It was the second Blue Jays homer of the game to bounce off the wall and out: Kelly Johnson's three-run shot in the third did the same.
Jose Bautista also connected for Toronto, which rallied from 5-0 down to beat the team with the best record in baseball.
Cordero (1-1) allowed Michael Young's tying single in the ninth.
Rangers outfielder Josh Hamilton (back) sat out for the second straight game and remains day to day.
RAYS 3, MARINERS 1
ST. PETERSBURG, Fla. (AP) — Matt Joyce had two of Tampa Bay's three hits, a solo homer and an RBI triple, to help the surging Rays beat Seattle for their ninth victory in 10 games.
Tampa Bay rookie Matt Moore (1-1) scattered seven hits over five innings to get the win, which kept the first-place Rays atop the AL East standings.
Victoria's Michael Saunders hit a solo homer and Jesus Montero went 4 for 4 for Seattle, but the Mariners were 0 for 5 with runners in scoring position. They have lost four straight following a four-game winning streak.
Joyce tripled off starter Hector Noesi (1-3) and scored on Luke Scott's sacrifice fly for a 2-0 lead in the first. Joyce's team-leading sixth homer made it 3-1 in the third.
Burke Badenhop and Joel Peralta combined for three scoreless innings out of Tampa Bay's bullpen. Fernando Rodney struck out the side in the ninth to earn his eighth save in eight opportunities.
The Rays played without third baseman Evan Longoria, who was placed on the 15-day disabled list before the game with a partially torn left hamstring. The three-time All-Star is expected to be sidelined four to eight weeks.
TIGERS 9, ROYALS 3
DETROIT (AP) — Austin Jackson had four hits and Rick Porcello pitched eight strong innings to lead Detroit past Kansas City.
The Tigers scored five runs in the first and won for only the third time in 11 games. Porcello (2-2) took advantage of the offensive support to snap out of his slump, allowing three runs and seven hits. In his previous two starts, the right-hander was 0-2 with a 15.26 ERA.
Luke Hochevar (2-2) yielded nine runs on 12 hits and three walks in four innings.
The teams were washed out Monday night, Kansas City's second rainout in three days. The Royals have lost two straight following a three-game winning streak that came on the heels of a 12-game skid.
ATHLETICS 5, RED SOX 3
BOSTON (AP) — Jarrod Parker scattered four hits over 6 2-3 innings for his first major league win and Oakland stopped a three-game skid by beating Boston.
Jemile Weeks ended on 0-for-12 slump with a leadoff single and finished 2 for 5 with two RBIs and two runs for the A's. Oakland scored the first five runs to back Parker (1-0), who made his third career start on a frigid night at Fenway Park.
Mike Aviles hit a two-run single in the ninth before Jordan Norberto got two outs for his first major league save.
Red Sox starter Felix Doubront (1-1) gave up five runs and six hits in four innings.
ANGELS 4, TWINS 0
ANAHEIM, Calif. (AP) — Jerome Williams pitched a three-hitter for his second major league shutout and Torii Hunter homered for the fourth time in five games to lead Los Angeles over struggling Minnesota.
Howie Kendrick also went deep against Francisco Liriano (0-4), but Albert Pujols was 0 for 4 with a run-scoring groundout. The three-time NL MVP has gone a career-worst 31 games and 125 at-bats since his last home run on Sept. 22, 2011, with St. Louis.
Williams (2-1) threw 109 pitches, striking out six and retiring 18 of his last 19 batters to finish in an economical 2 hours, 10 minutes. It was his third complete game in 81 career starts. His other shutout was on June 27, 2003, with the Giants, a seven-hitter against Oakland in his sixth big league start.
The 30-year-old right-hander from Honolulu faced only one batter more than the minimum before walking Denard Span with two outs in the ninth.
The Twins have lost eight of nine and have a major league-worst 6-17 record.
WHITE SOX 7, INDIANS 2
CHICAGO (AP) — Gordon Beckham snapped out of a slump with three hits and Chicago beat Cleveland on a rainy, fog-filled night in the Windy City.
Beckham was mired in a 0-for-10 slide and was batting just .153 before he belted a solo homer in the third inning to give the White Sox a 2-1 lead. He also singled in a run in the fifth.
A.J. Pierzynski also had a solo homer for Chicago, which is 3-0 against Cleveland this season. Chris Sale (3-1) allowed one run and three hits in six crisp innings.
Shelley Duncan connected for Cleveland, snapping the team's 11-game homerless streak. Ubaldo Jimenez (2-2) issued six walks in 4 2-3 innings and was charged with seven runs, four earned.