Fanduel won't let you parlay those two bets for whatever reason. But Draftkings does, even though they give the Cavs a slightly better shot.
Draftkings lets you parlay:
Cavs winning the east (+3000, or 30x what you wager)
and
Mobley gets MIP (+4200, or 42x with you wager)
Combined parlay odds: +142500, that's 1,425x what you wager. That means a $5 bet wins $7,125 lol. $100 wins $142,500.
Not saying it's likely but IF the Cavs were to have a top 4 seed, it's almost definitely because Mobley had a huge, highly visible improvement. And if they are a top 4 seed, there is a punchers chance at winning the east with some luck.
Edit: It's at least worthy of throwing the $5 at haha