JUPITER, Fla. -- Until a final decision is made on their Opening Day roster, the Marlins remain open to retaining some of their more promising non-roster invitees.

Pedro Alvarez belted two home runs, and drove in five runs on Saturday in Miami's 11-6 comeback win over the Mets in a game called with two outs in the ninth inning due to weather at Roger Dean Chevrolet Stadium.

Alvarez's big afternoon raised his Grapefruit League batting average to .321. The left-handed hitting first baseman, in camp on a Minor League deal, is making an impression.

"Pedro has actually been swinging the bat well for probably the last five, six days," Marlins manager Don Mattingly said. "You're starting to see the swing, the rhythm is getting better. Like everybody else, you're trying to get your rhythm, get your swing together."

Alvarez joins outfielders Harold Ramirez and Gabriel Guerrero, two right-handed hitters with power potential, who are capturing the organization's attention.

"You just keep looking, you never know," Mattingly said. "I like them. Both those guys, for me, have got the hit tool."

Ramirez, 24, previously was in the Blue Jays' system, and in 2018, he stepped up with a slash line of .320/.365/.471 with 11 home runs and 70 RBIs at Double-A. He continued his hot hitting playing Winter Ball in Venezuela, where he batted .381/.459/.556 in 44 games.

Guerrero, 25, played 14 games with the Reds last season, and at Double-A and Triple-A combined to hit .293/.328/.474 with 19 home runs and 81 RBIs.

The cousin of Vladimir Guerrero Jr., MLB Pipeline's No. 1 prospect, and nephew of Hall of Famer Vladimir Guerrero, Gabriel Guerrero has shown a strong arm at all three outfield spots.

Ramirez is more of a corner outfield option.

"Obviously, being non-roster is somewhat of an issue," Mattingly said. "But also, that can change. [Ramirez and Guerrero] are guys who can hit. Both interesting guys."

Alcantara has shaky start

After falling behind by six runs on Saturday, the Marlins rallied with 11 unanswered runs for their eighth straight Spring Training win. That was a positive on the rainy afternoon.

On the flip side, right-hander Sandy Alcantara had his struggles in 3 1/3 innings, allowing six runs on nine hits, albeit with seven strikeouts. The 23-year-old is competing for a place in the rotation.

"I'd say a step backwards, for sure," Mattingly said. "But he's had a really good spring. Today wasn't very good. We'll see how he bounces back. That's kind of the key for all of us. You're going to have rough days, and days it doesn't go as well as you'd like. It's going to happen to everybody. We'll see how he bounces back and responds."

In his previous start, Alcantara threw 4 1/3 scoreless innings against the Braves.

"I was trying to, coming out, inning after inning, trying to do things right," Alcantara said through an interpreter. "But I also allowed a few hits. That's things that happen during the game. I'll try to do things better."

Grandy birthday performance

Curtis Granderson celebrated his birthday on Saturday with a two-run double in three at-bats as the Marlins' leadoff hitter and left fielder.

Granderson turned 38 on Saturday, but the veteran is not slowing down. Instead, he's building for the season.

Getting ready for Opening Day has been a process for Granderson, who started off slowly in Spring Training. Early on, he dealt with a tight right calf, and got extra work on back fields to ease into playing shape.

"I think you see Curtis, he was taking a little bit of time," Mattingly said. "He was taking some time on the back [fields], and really getting some at-bats. Once you could see the at-bats coming, you can see they're sharper."

Granderson is a non-roster invitee, who is expected to be on the Opening Day roster.

Up next

On Sunday, the two teams that share Roger Dean Chevrolet Stadium square off, with the Marlins designated as the home team against the Cardinals. Trevor Richards, competing for a rotation spot, will get the ball for Miami in the game that starts at 1:05 p.m. ET. John Gant takes the mound for St. Louis.