When the Dallas Mavericks left Sergio de Larrea‘s draft rights parked in Valencia rather than rushing him stateside, the move invited the usual draft-and-stash skepticism. His first extended look in a Mavericks uniform answered a fair amount of it.
De Larrea signed a standard contract on July 3 and spent the 2026 Las Vegas Summer League running the offense. Over four games he averaged 8.0 points, 8.8 assists and 4.8 rebounds, and the assist number was the story. He posted 12 assists in his third game — a franchise Summer League record — then broke it a night later with 14. The previous mark of 11 had been set days earlier by Ryan Nembhard.
The scouting book on de Larrea coming out of Spain leaned on his shooting; in Las Vegas it was his passing and feel that carried Dallas’s second units. The shooting line was ugly — 27.3 percent from the field and 20 percent from three across a small sample — and that is the honest caveat here. A 20-year-old guard finding the roll man is not the same as a finished NBA rotation piece. But the Mavericks’ offense visibly ran smoother with the ball in his hands than without it, and Dallas closed the event 3-2.
The context matters. After an offseason that cleared Khris Middleton, Dwight Powell and others off the books, the front office needed cheap, useful backcourt depth, and de Larrea now looks like a developmental answer rather than a line item on the cap sheet. Nembhard opened the summer as the primary ball-handler and faded as it went; the offense tilted toward de Larrea by the end. That is a competition worth tracking into training camp, not a settled depth chart.
The next checkpoint is camp, where the backup point-guard minutes behind the top of the rotation are genuinely open — and de Larrea’s summer bought him a real seat at that table.
For fantasy purposes, de Larrea is a deep-league watch at best in redraft; the minutes and the shooting both have to stabilize before he is rosterable. In dynasty formats his summer nudges his stock up, especially in leagues that reward assists and bet on eventual playmaking volume. Keep him on the deep bench, not the waiver scramble.
