NFL draft tracker: Follow Rounds 4-7 live now

Which means that after the draft, they try and sign every guy still left on their draft board, as they feel those players effectively amount to extra draft picks. And that's why we also make a point of tracking these UDFA signings.

The 2015 NFL Draft continued Friday night in Chicago with the second and third rounds. The New England Patriots closed Thursday night's first round by selecting University of Texas defensive tackle Malcom Brown with the 

The NFL draft is not quite over yet. Rounds 4-7 take place today in Chicago, and the Detroit Lions have three picks left in the final four rounds – one each in Round 5, 6 and 7 – and a handful of other holes to plug, most notably defensive tackle. Pick

Which means that after the draft, they try and sign every guy still left on their draft board, as they feel those players effectively amount to extra draft picks. And that's why we also make a point of tracking these UDFA signings.

The bulk of the 2015 NFL Draft is underway Saturday in Chicago. After the first round Thursday night and the second and third rounds Friday night, this year's draft concludes with rounds four through seven, with the