Cardinals starter Luke Weaver is 7-0 with a 1.61 ERA since losing his only game of the season, and Cubs starter Jon Lester is coming off what was described as an awkward start as he struggled with his command against the Rays. He says he's fine physically and ready to go tonight. This will be the lefty's fifth start against the Cardinals this season and so far, he's 1-1 with a 3.28 ERA. Look for a low scoring game here and I am backing the UNDER as your Monday MLB 5* BEST BET.