From Mike Monroe of the San Antonio Express-News:
Re-exam of Kawhi Leonard's fractured 4th metacarpal (rt. hand) confirms simple fracture; in splint and out 3-4 weeks
— Mike Monroe (@Monroe_SA) January 23, 2014 
Leonard broke the fourth metacarpal right hand when his finger got bent back as he tried to get around a Steven Adams screen during the Spurs loss to the Thunder Wednesday night.
This leaves the Spurs without Leonard, Green and Tiago Splitter all due to injury.
For more on this story visit: Kurt Helin, NBC Sports