The Detroit Lions found their playmaker at running back in Reggie Bush and upgraded their secondary with safety Glover Quin.
But there's still a lot of make-or-break work to do before the season opens. Here are 10 questions that have to be answered:
1. Who will be the pass-rusher to replace defensive end Cliff Avril, now with Seattle?
This is easily the biggest void that has to be addressed. You can't win in the NFL without pressuring the quarterback.
The Lions added Jason Jones from the Seahawks, but he's more of a power guy than a speed rusher off the edge.
Detroit, which finished tied for 20th in the league in sacks last season, could use its No. 5 pick overall in the draft on BYU defensive end Ziggy Ansah, Oregon outside linebacker Dion Jordan or LSU linebackerend Barkevious Mingo.
2. Who will be the starting left tackle to replace retired Jeff Backus?
Based on the current roster, it would be Riley Reiff, last year's first-round draft pick out of Iowa.