These four players made a significant impact after joining during the regular season
The mid-season signings who helped their teams reach the Final Four

Sometimes adding a player to the roster mid-season can be the difference between a team achieving its goals or falling just short. Ahead of the 2025 Turkish Airlines EuroLeague Final Four, all four clubs – AS Monaco, Olympiacos Piraeus, Fenerbahce Beko Istanbul and Panathinaikos AKTOR Athens – signed at least one player during the regular season, with four of these individuals set to play important roles in Abu Dhabi.
In terms of name and prestige, Monaco beating out competition from both sides of the Atlantic to sign Daniel Theis in mid-February has to go down as a master stroke. Overnight, coach Vassilis Spanoulis saw his team go from a side that could maybe reach the Final Four to potential title contenders.
Theis, who is averaging 12.2 points and a team-high 5.4 rebounds entering the Final Four, played the final eight regular-season games before appearing in all five games against FC Barcelona in the playoffs. With 452 NBA games under his belt, the 33-year-old won’t be overawed by playing at the Final Four and will be eager to leave his mark as Monaco goes in search of its first EuroLeague championship.
Another player who will be feeling confident ahead of his first Final Four is Errick McCollum, who joined Fenerbahce in early January. The veteran guard is in his 15th season overseas and, even at 37, remains a source of instant offense for Fenerbahce. He arrived at a time when the team was suffering with plenty of injuries, but he settled in immediately and heads into the Final Four as the team’s second leading scorer (11.5 ppg.).
McCollum was initially brought in to cover for injuries to Wade Baldwin and Scottie Wilbekin, but with Baldwin available since Round 27, Fenerbahce has a 1-2 punch at the guard positions that will cause plenty of headaches for defending champ Panathinaikos in the semifinals. A 2016 BKT EuroCup champion with Galatasaray, McCollum will be determined to add a EuroLeague championship to his résumé in Abu Dhabi.
Speaking of the Greens, the broken fibula suffered by Mathias Lessort in Round 17 could have thrown their season into disarray. Eventual MVP Kendrick Nunn took his game to another level, but at center Panathinaikos was light – and even more so when Omer Yurtseven (who has now returned) went down. As he revealed on the EuroLeague & Friends podcast, Nunn quickly spoke with management to recommend his former teammate from the Los Angeles Lakers, Wenyen Gabriel, and a few days later – on December 23 – he was at OAKA.
Gabriel blocked 5 shots on his Panathinaikos debut in Round 18 and went on to finish the regular season with averages of 7.1 points, 3.9 rebounds and 1.1 blocks in 17 games. While the South Sudan international struggled to make an impact in the first four games of Panathinaikos’s playoff series with Anadolu Efes Istanbul, he stepped up in the win-or-go-home Game 5 with 8 points, 5 rebounds, 1 steal and 1 block to help book the Greens’ passage to the Final Four.
Just south of Athens, Saben Lee landed at Olympiacos minutes before the transfer deadline on February 26. It has been quite the debut season in Europe for Lee. After creating shockwaves with Turkish side Manisa Basket, he got a shot with EuroLeague side Maccabi Playtika Tel Aviv, where he played eight times and made several highlight reels. He soon returned to Manisa, but a call from Olympiacos – and a contract until 2027 – saw him join the Reds.
Working his way into coach Georgios Bartzokas’s well-oiled machine on the fly has been a difficult task, but there have been reasons for optimism in his 11 appearances, including good minutes in the playoffs against Real Madrid, posting 5.2 PPG, 1.5 RPG and a 7.2 PIR. Even if Lee is more a signing for the future, he has the chance to emerge and make a real name for himself at the Final Four.
The fight for the EuroLeague title begins with the semifinals on May 23 and will end with the championship game on May 25. Perhaps after the title decider, fans will look back fondly on the impact one of these mid-season signings made in Abu Dhabi.