The NBA has granted the Timberwolves an injury exemption due to all the players currently sidelined for the team, according to the Wolves' official Twitter account. The exception will allow the T-Wolves to sign a player to a 10-day contract.
This injury exception shouldn't be confused with the standard disabled player exception, which the NBA can grant to replace a player who suffers a season-ending injury. This injury exception allows Minnesota to carry a 16th player on its roster, as Larry Coon explains in his CBA FAQ:
Teams can temporarily have four players on their Inactive List (bringing their roster size to 16) with league approval in the event of a hardship. A hardship can be deemed to occur when the team has four players who are sick or injured and have missed at least three games, and will continue to be unable to play.
Nikola Pekovic and Alexey Shved are the latest Minnesota players to go down, having both suffered injuries on Thursday. Pekovic is expected to miss 7-10 days with a thigh contusion, while Shved's sprained ankle will be re-evaluated tomorrow. The pair joins Kevin Love, Chase Budinger, Brandon Roy, and Malcolm Lee as Timberwolves currently recovering from injuries.
The Timberwolves have signed Mickael Gelabale to a 10-day contract, a move that's expected to be announced today or tomorrow. While Gelabale will be the team's 15th man, the exception will allow the Wolves to add one more player on a 10-day deal, if they so choose.