"(Costa's) a tough, young center that has started games," Grigson said. "We drafted Khaled Holmes (in 2013) to be that center of the future. He never got a chance in (training) camp, really, because of the ankle (injury). He's still a little bit of an unknown at the professional level. It's going to be a good competition."
Indianapolis was one of four teams rumored to be interested in Cleveland Browns center Alex Mack, who was selected for his second Pro Bowl this season. The Browns placed a transition tag on Mack, offering him a salary just north of $10 million for 2014 and giving the team the right to match any offers from another franchise.
That has made for a silent market, and Grigson did not sound like a man about to make noise. He mentioned former Colts center Jeff Saturday — who made 202 starts over a 14-year career that included six Pro Bowl trips — as an example of a successful player at the position who entered the league without being drafted.
Grigson also served in the front office of three Super Bowl teams — two in St. Louis and one in Philadelphia — that made it to the NFL's championship game with a starting center who was not drafted.
"That's a position where you can find a quality guy, and you don't always need to have a high-profile player at that spot," he said.
Safety appears to be another position of need after Antoine Bethea, who had started every game for Indianapolis in the past six years, signed a free-agent deal with the San Francisco 49ers. Delano Howell, a 24-year-old who made three starts in place of LaRon Landry last year, is one option to fill the void.
"We will, of course, look at the draft," Grigson said. "We are still looking at some other options. We want to solidify every position group possible the best we can. You lose a stud like Antoine who meant so much to this organization, obviously it's going to leave a mark. But, at the same time, you can't keep everyone. That's just the harsh reality of this business."