ST. LOUIS -- Spending nine years in the Minor Leagues raised some doubts for Justin Ruggiano about his baseball future.

Normally, a player doesn't make his first real mark in the big leagues at age 30. And considering he didn't previously have many opportunities, Ruggiano was unsure if or when he would get his Major League break.

It has come with the Marlins.

The outfielder has stepped up, batting .405 with five home runs and 15 RBIs in 30 games. In the four-game series at Milwaukee, he was 7-for-16 with three home runs and six RBIs. He collected two more hits in Friday's 3-2 win over the Cardinals.

Ruggiano joined Miami in a Minor League deal with the Astros on May 26. A day later he was in the big leagues. Now, it's going to be tough to keep him out of the lineup.

"In the Minor Leagues, you've got to be mentally tough," Ruggiano said. "I was thinking about life after baseball while I was in the Minors quite a bit. You get stuck in that Minor League system and you feel like there is no light at the end of the tunnel.

"Eventually, you're not going to play Minor League ball forever."

Ruggiano, whose new Twitter handle is @JustinRuggiano, has been one of Miami's biggest surprises, because it appears he literally came out of nowhere.

He came up through the Rays' system, and he made his big league debut in 2007, appearing in seven games. In 2008, he saw action in 45 games. From there, he was in the Minor Leagues.

Ruggiano resurfaced with Tampa Bay for 46 games in 2011.

In the offseason, he was left off the Rays' roster, and the Marlins tried to sign him to a Minor League deal. But the outfielder opted to hook up with the Astros, and he opened the season at their Triple-A affiliate in Oklahoma City.

"He was on our radar in the offseason," Marlins general manager Michael Hill said. "Our goal from Day 1 in the offseason was to bring in right-handed bat competition. The makeup of our roster, we wanted a right-handed complement."

The Marlins ended up signing Aaron Rowand and Austin Kearns to Minor League deals. Rowand was released at the end of Spring Training. Kearns made the roster, and he's still with the club.

Ruggiano is just trying to make the most of his opportunity.

"I've always thought that if I was given a chance and an extended look, I'd eventually perform," he said. "Sometimes it takes a while to get comfortable, and to adapt."

Marlins trying to weather sweltering heat

ST. LOUIS -- It was extremely hot when the Marlins played four games in Milwaukee earlier this week.

The conditions were even hotter on Friday for the start of a weekend series in St. Louis.

A day after playing in 101-degree conditions at Miller Park, the temperature reading at Busch Stadium during warmups on Friday was 105 degrees. By first pitch, the thermometer dipped to 103, which still tied the hottest game-time temperature in Marlins history. A game in Arizona on June 14, 1999, was also 103 degrees at first pitch.

Marlins manager Ozzie Guillen said he doesn't want his players complaining about the heat.

"There is a reason we don't take batting practice today and tomorrow, because I don't want to hear that," Guillen said. "If somebody says it is hot, we'll send him to the hotel, I don't want him here. Especially, we come from Miami, and they played in the worst ballpark ever to play [Sun Life Stadium]. I don't want to hear it."

Marlins hitting coach Eduardo Perez formerly played for the Cardinals, and he knows how hot it gets in St. Louis.

"On the field itself, you try to keep the guys that are in there hydrated more than anything," Perez said. "It's pretty much a lot of focus, you can't throw away at-bats. There is a tendency to throw away at-bats. I think it's harder on the pitchers than it is on the hitters. We need to keep them out there as long as we can, offensively.

"The beauty of it is, they have to [also]. Our offense has to try to keep their defense out there as long as possible. If we can do that, we should be good."