Again you guys don't know what you are watching. The linebacker was right there for Marv, if Kyler hits him he gets destroyed or the LBer makes a break on it and it's a pick. You see him "open" after kyler has already started his throwing motion to the dump off, when the LB breaks on play. I beg of all of you wanna be film watchers to at least try to know what you are talking about!
So Kyler takes the easy play by throwing to his check-down with two defenders converging on the RB. he couldve thrown to his X receiver (I think that's Zay) or thrown MHJ open seeing that there's open field down the seam.
There are two better options on the play, and both happen to be WRs, which is the complaint that us fans have about Drew's offense and Kyler's lack of vision.