MIAMI -- For at least one night, the Florida Marlins followed manager Jack McKeon's pregame message.
Reliever Doug Brocail walked Luis Castillo on four pitches to force in the go-ahead run and Mike Lowell hit a grand slam one out later to highlight the Marlins' seven-run eighth inning in a 12-5 victory over the Texas Rangers on Friday night.
Paul Lo Duca, Miguel Cabrera and Alex Gonzalez each drove in two runs for the Marlins, who had lost 12 of 15.
"We started a new season today. We're going to play like we did in the past," said McKeon, whom several unnamed Marlins criticized in a local newspaper Friday. "We talked about (starting over) before the game. I told them to have a little fun. Now we have to keep it going."
The Rangers lost their fourth straight and seventh in nine games.
"We know we're struggling and we're not playing to the best of our abilities," catcher Rod Barajas said. "Yet we look at the leaderboard and no one's really pulled away."
After the Rangers scored four runs in the eighth to tie it, Brocail (3-1) entered and struck out Juan Encarnacion. The right-hander then gave up a single to Gonzalez, walked pinch-hitter Lenny Harris and then gave up another single to Juan Pierre to load the bases. Castillo then walked to give Florida a 6-5 lead.
"A bad day's a bad day," Brocail said. "You just have to chalk it up and move forward."
After Cabrera singled in Harris, Brian Shouse relieved and struck out Carlos Delgado before surrendering Lowell's fourth career grand slam. It was Lowell's third homer this season and first since April 12 against Philadelphia -- a span of 45 games and 161 at-bats.
"I wasn't sure I was supposed to keep running around the bases," Lowell said with a smile. "I knew it was a long time (since I homered), I just didn't know how long."
Florida's A.J. Burnett, winless his last seven starts, left in the eighth with a 5-1 lead, two runners on and one out.
After left-hander Chad Bentz retired Hank Blalock, right-hander Guillermo Mota relieved and gave up Richard Hidalgo's run-scoring single and Laynce Nix's two-run double.
Todd Jones (1-1) relieved and gave up Barajas' RBI single that tied the score.
Burnett gave up three runs, seven hits and three walks. He struck out 10 and passed Ryan Dempster to become the Marlins' career strikeout leader.
"We got the 'W' and that's what counts," Burnett said. "We needed a game where we ended up on top."
Texas starter Chan Ho Park, who had won his previous five decisions, allowed five runs and in 4 2/3 innings.
"Chan battled," Rangers manager Buck Showalter said. "There were a lot of situations with two strikes and he made bad pitches."
The Marlins took a 5-1 lead with three runs in the fifth, scoring on Cabrera's RBI double, Park's wild pitch and Lo Duca's sacrifice fly.
Park, who singled twice, had his first hits since Oct. 5, 2001, with the Dodgers.
The Rangers placed RHP Nick Regilio on the 15-day disabled list with elbow tendinitis and recalled RHP Juan Dominguez from Double-A Frisco. Texas also purchased the contract of LHP C.J. Wilson from Frisco and optioned LHP Michael Tejera to Triple-A Oklahoma. Both Dominguez and Wilson relieved in the game. ... Burnett passed Dempster (628) when he struck out Nix to start the second inning. He struck out the side in the first. ... Max Mayfield, director of the National Hurricane Center, threw out the first pitch on a day Tropical Storm Arlene brought rain to the South Florida area.