The Lions lost six of their final seven games of the 2013 season despite leading after three quarters in each of them, and White has put that down to a lack of "closers" on the roster.
"You saw six games out of seven where we did not finish," NFL.com quotes White as saying. "So we're going to be looking for closers. Look for them in free agency - guys who have been there, guys like our coaching staff that have been there, guys that will not quit.
"We have some now, but we need some additional players that have that same kind of mindset. That's what we've done so far, and we still have a lot of work to do."
The Lions finished third in the NFC North last season with a 7–9 record.