The San Antonio Spurs went to the NBA Finals before falling to the New York Knicks, despite having a young roster.They want to run it back next season, and they're bringing back one of their veterans to help out.Harrison Barnes has re-signed with the Spurs, according to the NBA's official transaction log on Wednesday.It's not a total surprise, but it's a nice little boost for San Antonio. Barnes of course brings with him NBA championship experience from his time with the Golden State Warriors. He got just one ring before leaving Golden State, but Barnes has been a reliable player since then, too.Barnes spent parts of three seasons with the Dallas Mavericks, then parts of six campaigns with the Sacramento Kings.Now, he'll be entering his third season with the Spurs.Barnes started all 82 gam