Former South Carolina star Spencer Rattler had to wait until the fifth round before his name was called in the NFL Draft, but it appears as though he has ended up in a good spot. The Saints eventually selected Rattler with the No. 150 overall pick. The plan is to give him an opportunity to compete for the starting job, according to head coach Dennis Allen. “The plan is that he comes in and really basically competes, and we’ll let the cards kind of play out as they do,” Dennis Allen told Rich Eisen. Starting quarterback Derek Carr is back for the Saints, but the 33-year-old has been inconsisten…