Harbaugh says team didn’t know about Tarell Brown workout clause

49ers cornerback Tarell Brown opted not to participate in the team’s voluntary offseason program.  He didn’t know that his decision resulted in the loss of $2 million in 2013 base salary. According to Matt Maiocco of CSNBayArea.com, coach Jim Harbaugh said Sunday that the team didn’t know, either, until after Brown’s ability to preserve the…