Senior analyst Larry Hartstein is on a sick MLB tear, and now he's attacking Friday's jam-packed slate with his three best bets. Hartstein has nailed 57 of his last 90 MLB picks (63.3 percent), returning $2,097 to $100 bettors.

Success on the diamond is nothing new for Hartstein: He's racked up profits every year since SportsLine launched in 2015. Entering the 2019 season, Hartstein was 306-238 all-time on MLB money-line picks, returning more than $2,000 to $100 players.

Now Hartstein has broken down every game on Friday's MLB schedule and locked in his three best bets. Parlaying his three selections would pay out at nearly 4 1/2 to 1.

We can tell you Hartstein is taking Zack Greinke and the Diamondbacks (-179) to handle the host Marlins at 7:10 p.m. ET.

"The Diamondbacks get David Peralta back in the lineup Friday, and they're in good position to open this road trip with a win behind Zack Greinke," Hartstein said. "He's 7-0 with a 3.19 ERA lifetime versus the Marlins, including 2-0 with a 0.66 ERA last season. Marlins starter Sandy Alcantara is 2-7 with a 5.48 ERA at night, allowing batters to hit .287. His ERA this month is 6.48. Lay it."

Hartstein is also high on a feisty home underdog, saying this puppy is a strong value to win outright at a lucrative money line price. You ABSOLUTELY need to see what he's picking before you make any plays of your own.

So which MLB picks should you make Friday for a nearly 4 1/2 to 1 payout? And which home underdog do you need to be all-in on? ... Join SportsLine right now to get Friday's MLB best bets, all from the white-hot expert who has nailed 57 of his last 90 picks!