Key Highlights:
- The Dallas Mavericks have officially signed Spanish center Guillermo Díaz-Graham shortly after waiving his twin brother, Jorge Díaz-Graham.
- Both Díaz-Graham brothers agreed to “Exhibit 10” contracts, which serve as non-guaranteed preseason tryout agreements designed to direct talent toward the NBA G League.
- Selected No. 1 and No. 3 overall in the 2026 G League International Draft, both brothers are projected to join the Mavericks’ affiliate, the Texas Legends, for the upcoming season.
Mavericks Roster Maneuver: Guillermo Díaz-Graham Steps in for Twin Brother Jorge
In a rapid sequence of roster adjustments during the preseason, the Dallas Mavericks have signed 23-year-old Spanish big man Guillermo Díaz-Graham. The transaction occurred just hours after the organization parted ways with his twin brother, Jorge Díaz-Graham. Standing at 2.13 meters (approximately 7 feet), Guillermo steps into a dynamic identical to the one his 2.11-meter (6-foot-11) brother experienced earlier in camp.
While official terms were not released by the front office, local Dallas media reports indicate that Guillermo agreed to an “Exhibit 10” contract—the exact deal framework previously signed by Jorge. Under NBA collective bargaining guidelines, an Exhibit 10 deal is a one-season, minimum-salary contract without guaranteed money. It functions primarily as a training camp invitation and preseason evaluation mechanism, allowing organizations to assess talent while securing affiliate development rights.
Path to the Texas Legends and G League International Draft Roots
According to reports from CBS Sports and Spanish basketball outlet Gigantes, if Guillermo Díaz-Graham is waived before the regular season tips off, he is anticipated to join the Texas Legends, the Mavericks’ NBA G League affiliate. This roster mechanics strategy allows Dallas to integrate developmental players into their system and provide performance-based financial incentives without occupying a protected slot on the official 15-man NBA roster.
The twins entered the franchise’s orbit together during the 2026 G League International Draft, an event specifically organized for global prospects outside the traditional draft pool. The Texas Legends capitalized on that draft by selecting Jorge Díaz-Graham with the No. 1 overall pick and subsequently claiming Guillermo Díaz-Graham with the No. 3 overall pick. Under league rules, drafting franchises retain the G League rights to selected international players for two seasons.
From the Canary Islands to the NCAA: Player Profiles
Jorge Díaz-Graham: Floor-Spacing Big Man
Jorge Díaz-Graham recently showcased his skill set during his NBA preseason debut for Dallas, logging 12 minutes and contributing 5 points, 3 rebounds, and 1 assist. Hailing from the Canary Islands, the 2.11-meter forward is recognized for his perimeter mobility and perimeter shooting touch. His developmental path began in the youth system of La Laguna Tenerife before he relocated to the United States to compete for IMG Academy. Jorge then advanced to college basketball, spending three collegiate campaigns with the Pittsburgh Panthers before completing his final year with the Oregon State Beavers, where he posted averages of 6 points, 3.6 rebounds, and 1 assist in 17.9 minutes per game.
Guillermo Díaz-Graham: International Acclaim and Rim Presence
Guillermo Díaz-Graham followed an almost parallel trajectory alongside his brother, transitioning from Tenerife to IMG Academy and then to Pittsburgh. In his final NCAA campaign, Guillermo transferred to the San Francisco Dons, where he averaged 5.2 points, 3.2 rebounds, and 1.3 assists in 17.2 minutes of action per game. At 2.13 meters, Guillermo also brings international credentials to the Dallas system, having earned gold as an Under-20 European champion and securing selection to Spain’s senior B national squad.
Why This Matters
The swift exchange of Exhibit 10 deals underscores how modern NBA franchises maximize the fringes of their training camp rosters to feed their G League pipelines. By cycling both Jorge and Guillermo Díaz-Graham through short-term preseason contracts, the Mavericks ensure that the Texas Legends enter the upcoming season with two versatile, 7-foot frontcourt prospects whose developmental rights they control through the G League International Draft framework.
Frequently Asked Questions
What is an Exhibit 10 contract in the NBA?
An Exhibit 10 contract is a one-year, non-guaranteed minimum-salary NBA deal that serves as a tryout agreement. If a player on an Exhibit 10 contract is waived by the NBA team, they can transition to the franchise’s G League affiliate and earn a financial bonus if they remain with the minor league squad for a specified period.
Where are Jorge and Guillermo Díaz-Graham expected to play this season?
If Guillermo is waived prior to the NBA regular season—mirroring the transaction involving his twin brother Jorge—both brothers are positioned to play for the Mavericks’ G League affiliate, the Texas Legends, who hold their rights following the 2026 G League International Draft.
Where did the Díaz-Graham twins play college basketball?
Both brothers spent three seasons competing in the ACC for the Pittsburgh Panthers. For their final collegiate campaigns, Jorge played for the Oregon State Beavers, while Guillermo played for the San Francisco Dons.
