What happened: In the 2018 NFL Draft, the New York Jets traded up from the No. 6 overall pick to No. 3 to select Darnold out of USC, while the Indianapolis Colts used the sixth selection on Nelson out of Notre Dame, per Albert Breer. Indianapolis also used the draft capital from that deal to select Auburn offensive lineman Braden Smith (37th overall in 2018), Kemoko Turay, Jordan Wilkins and Temple cornerback Rock Ya-Sin (34th overall in 2019).

Why it matters: Acquired by Seattle ahead of Week 8, Nelson steps in to protect a quarterback who leads the NFL with 11 interceptions under pressure over the last two seasons. The eight-time Pro Bowler brings an 85.7 PFF grade that ranks second among NFL guards. For Indianapolis, the deal marks the start of a veteran sell-off after a 16-10 loss at Minnesota on Oct. 25 dropped the club to 2-5 and 12th in the conference on a three-game skid.

What to watch: Seattle will integrate Nelson into its interior pass protection for Week 8 regular-season action. Indianapolis remains active ahead of the Nov. 10 trade deadline, shopping defensive tackle DeForest Buckner while running back Jonathan Taylor draws trade interest.