The Spurs are expected to extend training camp invitations to a pair of veteran NBA swingmen a development that underscores the team's most glaring positional need heading into the 2013-14 campaign. Sam Young and Corey Maggette are among the hopefuls expected to join the team when it opens camp at the Air Force Academy in Colorado Springs Colo. on Tuesday NBA sources said. Both will be among the contenders for the 15th and final spot on the opening-day roster which is lacking a backup for small forward Kawhi Leonard. The Spurs' 20-man camp roster still is under construction and might not be released until Monday's media day. Yet the lines surrounding what should be camp's most heated battle already are being drawn. Young 28 split his first four NBA seasons among Memphis Philadelphia and Indiana where last season he was a key defensive reserve for the eventual Eastern Conference finalists. Maggette 33 was a scoring force earlier in his career averaging a high of 22.2 points in 2004-05 with the Los Angeles Clippers. The Spurs courted Maggette as recently as the free-agent summer of 2008 when he spurned them to sign with Golden State.