Tobias Harris will miss the San Antonio Spurs' preseason after straining his left calf during training camp. An Associated Press report on NBA.com says he will be re-evaluated after the team's five-game preseason schedule. His availability for the October 20 regular-season opener against the Oklahoma City Thunder is currently questionable. Harris joined San Antonio on a two-year deal, but his Spurs debut now depends on his recovery and the team's next assessment. No confirmed return date is given.