Cary Edmondson-USA TODAY Sports
Vontae Davis: A
Based on my initial rewatch, Vontae Davis didn't allow a single completion all day and generally blanketed the entire left side of the field. There was one completion that was nearly allowed in the first quarter, but outside of that play, Davis locked down both Kyle Williams and Anquan Boldin on the outside.
Greg Toler: B+
Greg Toler allowed a couple passes and got pushed around a bit in run defense, but overall, like Davis, smothered his receivers and kept Colin Kaepernick and the 49ers offense from gaining any momentum. The secondary's complete dominance was what won this game for Indianapolis, and Toler was a big part of that.
Darius Butler: A
We don't always cover the slot cornerback in this piece, but Darius Butler deserves a shout out after his big day. He wasn't quite as good as Davis, but didn't back down from Boldin physically and tackled well, as well as picking up a pass breakup.
Antoine Bethea: B+
Antoine Bethea gets a slight tick for gambling on a Kaepernick throw early on that resulted in a 24-yard gain for Anquan Boldin, something that's happened in a couple straight games now. But overall, Bethea was a great clean-up guy for Indianapolis on Sunday, including this huge third-down stop that brought every Colts fan to their feet.
Delano Howell: A+
This year's Melvin Bullitt, Delano Howell filled in for an injured LaRon Landry and impressed everybody.
Howell came on the radar in the preseason when he was extremely active, and his play was even more noticeable on Sunday. Howell wasn't afraid to lay wood on receivers over the middle, but didn't give up any big plays either.
It was fantastic showing by the former Stanford Cardinal, and the Colts may not have had near the success they did without his play.