Willis pitched a five-hit shutout and Cabrera homered twice to lead Florida to a 9-0 win over the Washington Nationals on Friday night.
"In 2003, when they came up as young kids, they just supplied so much energy for the rest of the club," Marlins manager Jack McKeon said. "They love to play the game, and the rest of the guys feed off that."
Willis (1-0), the 2003 rookie of the year, allowed just one walk and handed the Nationals their first shutout as a Washington team. The Nationals had 40 hits in their season-opening three-game series at Philadelphia.
It was the third career shutout for the left-hander, who went 10-11 last season.
"Us young guys, the more we go out there, the more confident we get," said Willis, who threw 97 pitches.
"I just play my game, and that's it," Cabrera said. "I don't want to say I'm going to hit 30 home runs or 40 home runs. I'm going to do my best and that's it."
Cabrera, who led the Marlins with 33 homers last season, hit a two-run shot off Osuna in the Marlins' six-run eighth. Willis had a two-run single off Joey Eischen.
Ohka gave up three runs and five hits in six innings. The right-hander's career record against Florida fell to 1-9 with a 5.07 ERA.
:He wasn't real good out there; he looked uncomfortable," Nationals manager Frank Robinson said. "He never did get in his groove and he never did get the ball down."
Mike Lowell hit a two-out solo homer off Ohka with two out in the sixth inning. Cabrera hit a solo shot in the first inning for his first home run of the season before Alex Gonzalez's RBI single in the second. It was the third multihomer game for Cabrera.
Willis allowed two hits in the ninth but got Cristian Guzman to hit into a game-ending double play. Willis improved his career record to 6-2 against the Washington franchise, formerly the Montreal Expos.
"He knows how to make those pitches. When he needs a ground ball for a double play, he makes that pitch," said Washington's Jose Guillen, who was 0-for-3. "He was moving the ball real well and throwing strikes."
Washington announced that Wil Cordero, who was placed on the 15-day disabled list Thursday, will undergo surgery on Tuesday to repair a torn medial meniscus. Marlins team physician Dan Kanell will perform the surgery. Cordero is expected to miss six to eight weeks. ... The Nationals purchased infielder Carlos Baerga's contract from Triple-A New Orleans. The switch-hitting Baerga hit .229 with an RBI in 19 spring training games with Washington. ... Marlins second baseman Luis Castillo was dropped from second to seventh in the batting order. Right fielder Juan Encarnacion batted second behind Juan Pierre. ... The shutout was Willis' first since June 21, 2003, against Tampa Bay in a five-inning game.