MAVS NEWS:

[F Gump]

Is there a chance to extend [Lively] for a reasonable amount next summer - or still a year too early? 

The window for an extension opens and closes next off-season (July 1 to opening day).

The chance of an extension actually happening was 0 already, and it's still 0. The Mavs won't want to pay very much for an injury prone player who sits as much as he plays. DL won't want to be locked into a small contract. 

So they will kick the can down the road a year, observe what he does (and his health) in 26-27, then do the RFA thing in 27.