UDFAs comprised a larger percentage of the NFL pool of starters than players drafted in Rounds 4, 5, 6 or 7. From 2019 to 2023, 429 undrafted players — more than 12 percent — reached the starting lineup. In 2018, only one undrafted rookie — Green Bay wide receiver Robbie Anderson — was in a Week 1 starting lineup. In 2016 the Bengals picked wide receiver Cody Core at 199.