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After taking care of several needs in free agency, Detroit Lions general manager Martin Mayhew still has several roster holes to fill.

(AP Photo)

The Detroit Lions took care of some major items on the offseason shopping list in the first few weeks of free agency, but as general manager Martin Mayhew likes to say, there is no finish line when it comes to constructing an NFL roster.

With the draft coming up in five weeks, the team still his plenty of holes to fill. Here are the five biggest, in no particular order.

Matthew Stafford insurance policy

The Lions have been reluctant to assign backup quarterback responsibilities to Kellen Moore, and unless something changes in the next few weeks, the team will either draft competition for the spot or pick a veteran off the scrap heap.

Among unemployed veterans are Josh Freeman, Dan Orlovsky, Colt McCoy and Kevin Kolb. Each has some degree of starting experience, while Orlovsky has some familiarity with Lions coach Jim Caldwell from their time together in Indianapolis.

The draft offers several interesting options in the later rounds, including San Jose State's David Fales, Pittsburgh's Tom Savage, and the guy who took over for Stafford at Georgia, Aaron Murray.

An edge rusher capable of getting to the QB

There's reason to be concerned about Detroit's outside pass rush. Ezekiel Ansah and Devin Taylor are still developing prospects, Jason Jones is coming off a serious injury and didn't show much in limited action last season, and Darryl Tapp has just seven sacks the past four seasons.

The Lions could use either another defensive end or a rush linebacker in the draft. The opportunity to add one might come as early in the first round if UCLA's Anthony Barr is available at No. 10.

More youth in the defensive backfield

It wouldn't truly be the offseason if the Lions weren't looking to improve the secondary. So far, the primary adjustment in the back end has been the lateral move of swapping out Louis Delmas for James Ihedigbo at safety.

The draft is deep at cornerback, and the Lions could easily find quality talent in the middle rounds to add to their young corps built up through the past two drafts.

Safety is a greater concern. Ihedigbo is a quality stopgap, but the Lions could certainly benefit from adding a younger option to groom as an eventual replacement. It's a reach to think the team will use it's first-round pick on the position. Plus, the talent is simply not as deep as it is at corner. Terrence Brooks, Deone Bucannon or Jimmie Ward would all be nice options on day two.

Another target for Stafford

Signing Golden Tate to a long-term contract was a great start to the offseason for Detroit. He's a sure-handed receiver capable of making tacklers miss and should provide an excellent complement to Calvin Johnson.

But the Lions need more talent at the position. That's why there's so much speculation about the team trading up to snag Sammy Watkins, or sitting tight and selecting Mike Evans at the 10 spot.

But even if the Lions pass on a receiver in the first round, it might be the deepest position in the draft. If the team wants speed, Donte Moncrief or Paul Richardson are day-two options. If it's size Detroit wants, Kelvin Benjamin appears to be sliding. Even if he doesn't drop, Martavis Bryant and Jordan Matthews should be there in the second round.

A reliable boot when the game is on the line

David Akers wasn't the disaster some made him out to be last season, but he certainly didn't do enough to keep fans from pleading for the organization to bring Jason Hanson out of retirement.

The Lions have two young kickers on the roster -- Giorgio Tavecchio and John Potter. At this time, the team seems content to let them battle it out in training camp for the job, but there's obviously room for an upgrade here.

Detroit solved years of punting woes by selecting Sam Martin in the 2013 draft and should be looking for a placekicking solution through the same avenue this May.

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