MLB odds, lines, picks: Advanced computer model includes the Mets in parlay for Tuesday, August 20 that would pay more than 6-1

Monday night featured two walk-off home runs for two teams that could have really used a victory to strengthen their playoff positions. Yandy Diaz hit a walk-off home run for the Astros over the Red Sox as Houston begins to create seperation at the top of the AL West. Meanwhile, Francisco Alvarez hit a walk-off home run for the Mets over the Orioles as New York pulled within 1.5 games of the final NL Wild Card spot. All four of those teams involved in those games are in the hunt for the playoffs so with the Houston Astros vs. Boston Red Sox and New York Mets vs. Baltimore Orioles set to play again on the Tuesday MLB schedule, should you include either of them in your Tuesday MLB parlay? Minnesota Twins starter Bailey Ober has been one of the most dominant pitchers in baseball over recent weeks and with him getting the start on Tuesday, should you include the Twins in MLB parlay bets?

The Astros are -127 favorites (risk $127 to win $100) in the latest Red Sox vs. Astros odds, while the Red Sox are +107 underdogs. The over/under for total runs scored is 8.5. The game is one of 15 on the packed MLB schedule for Tuesday. (See up-to-date lines for every game on our MLB odds page.)

Before making any MLB picks or parlays, be sure to see the predictions and betting advice from SportsLine's proven computer model, which hit on a three-leg parlay last Monday for a payout of more than 7-1!

The SportsLine Projection Model simulates every MLB game 10,000 times. Entering Week 21 of the MLB season, it's on a 25-13 roll on top-rated run-line picks (+732) that dates back to last season. Anybody following has seen STRONG returns!

Now, the model has set its sights on the MLB schedule for Tuesday and has generated a three-leg parlay that would pay more than 6-1! The parlay doesn't start until 6:45 p.m. ET, giving you plenty of time to make your MLB picks.

We can tell you that one of the picks is the New York Mets (-121) to defeat the Baltimore Orioles. But the model has two other picks, including play on an NL underdog! You ABSOLUTELY need to see them before locking in any MLB picks of your own.

So which NL underdog is a MUST-BACK? And what other teams do you need to include in your parlay for a payout of more than 6-1? ... Join SportsLine right now to find out which picks you should be all over on Tuesday, all from the model that is 25-13 on top-rated MLB run-line picks that dates back to last season.