Miami Marlins third baseman Martin Prado is expected to miss the start of the regular season after straining his right hamstring at the World Baseball Classic. Marlins manager Don Mattingly already has ruled out Prado playing in any exhibition games. "Obviously, it's never good, but I'm encouraged it's a Grade 1," Mattingly said Sunday at Marlins camp in Jupiter, Florida. "From there we just kind of wait until he's ready, honestly. We hope that he misses as little as possible, but we're going to definitely err on the side of caution." A Grade I strain is considered the least severe. Playing for Team Venezuela, Prado injured his hamstring running out a grounder in the sixth inning of Wednesday's loss to the United States. The Marlins are not attaching a timeline to his return to the lineup. "We say, oh, he's only going to miss two weeks, then that two weeks comes and he's thinking, ‹I've got to be ready by then' and if he's not quite ready then he's just not quite ready," Mattingly said. "I'd rather say we are going to get him healthy, make sure he's healthy." The Marlins open the regular season April 3 at Washington. Elsewhere around the Grapefruit and Cactus Leagues: Twins 13, Red Sox 8 Boston starter Drew Pomeranz exited early due to triceps tightness. He lasted two innings and allowed three earned runs. The left-hander said he didn't think the trouble was anything serious. Hanley Ramirez hit his third homer for Boston, and Mitch Moreland went 3 for 3. Rays 8, Phillies 0 Corey Dickerson hit his third homer and Steven Souza Jr. had two hits and scored twice for Tampa Bay. Rays starter Justin Marks and three relievers combined to retire the first 22 Phillies hitters before Tommy Joseph broke up the perfect game try with a double. Tigers 7, Orioles 1 No definitive word yet on when Detroit right fielder J.D. Martinez will be back from his sprained foot. He was injured Saturday making a catch and a specialist is going to look at the injury. Matt Boyd threw five solid innings, allowing just one run. Boyd is currently in contention for one of the Tigers' final rotation slots behind Justin Verlander, Michael Fulmer and Jordan Zimmermann. Yankees 6, Astros 4 Former Yankees catcher Brian McCann went 3 for 3 against his old team, and Houston starter Lance McCullers Jr. allowed two earned runs in 3 2/3 innings. Chase Headley had two hits for New York, including a two-run double. Cardinals 5, Braves 2 St. Louis starter Lance Lynn worked five scoreless innings, allowing four hits and lowering his spring ERA to 1.29. Matt Adams homered and Tommy Pham, Randal Grichuk and Jedd Gyorko all doubled. Julio Teheran, set to be Atlanta's opening day starter for the fourth consecutive year, gave up three runs and six hits in five innings. Blue Jays 11, Pirates 11, 9 innings Gerrit Cole made his second Grapefruit League start and first since March 3, working five strong innings. He gave up five hits, including a home run by Ezequiel Carrera, and struck out five. David Freese doubled and singled for Pittsburgh, raising his average to .360. Nationals 10, Marlins (ss) 4 Working on ways to prevent tipping his pitches, Stephen Strasburg tossed 4 1/3 innings. He allowed two earned runs and four hits while striking out three. Ryan Zimmerman hit his first home run of the spring for Washington. Miami starter Adam Conley went 2 2/3 innings was touched for seven runs on five hits and three walks. Marlins (ss) 7, Mets 5 Miami starter Jose Urena did not give up a run in 4 1/3 innings, working around four hits and four walks. Matt den Dekker hit two homers, including one off Jacob deGrom. DeGrom gave up four runs and seven hits in 5 1/3 innings. Royals 6, Cubs 2 Ian Kennedy pitched six shutout innings against the defending World Series champions and allowed three hits while striking out seven. Mike Moustakas hit his third home run of the spring and added a sacrifice fly. Christian Colon had a two-run single for Kansas City. Brewers 6, Giants 4 Kirk Nieuwenhuis and Hernan Perez both hit their third home run of the spring for Milwaukee. Perez added an RBI single, Travis Shaw had an RBI double and the Brewers chased San Francisco starter Jeff Samardzija early. Diamondbacks 4, Indians 4, 9 innings Edwin Encarnacion laced an RBI double and Cleveland prospect Yandy Díaz had three hits and an RBI. Díaz was the International League Rookie of the Year in 2016. Patrick Corbin yielded two earned runs through five innings for Arizona. The left-hander is trying to rebound from a 6.30 ERA in 2016. Rangers 3, Mariners 2 Carlos Gomez launched a two-run homer and Ryan Rua added a solo shot for Texas. Leadoff man Delino DeShields Jr. had two hits. Mitch Haniger had an RBI double and Taylor Motter finished with two hits for Seattle. Dodgers 3, Japan 2 Free-agent addition Franklin Gutierrez had two hits and scored a run for Los Angeles in an exhibition game against Japan's team in the World Baseball Classic. O'Koyea Dickson drove in two runs with a game-ending double for the Dodgers. Rockies 9, Athletics 2 Jon Gray improved to 2-0 this spring by giving up just two hits in five innings. He permitted one run while striking out seven. Charlie Blackmon doubled and homered to drive in three runs. White Sox 11, Angels 2 Yoan Moncada hit his third home run of the spring and doubled twice, driving in four runs for Chicago. Moncada was the centerpiece prospect acquired from Boston in the trade for Chris Sale. Carlos Rodon gave up one hit over four innings. He walked one and struck out five. Reds 9, Padres 4 Cincinnati prospect Amir Garrett, a former power forward at St. John's who is vying for a spot in the big league rotation, gave up three runs and eight hits in five innings. Garrett threw 38 pitches and is 3-1 this spring.