There was some debate over the accuracy of his 4.19-seconds clocking in the 40-yard dash at Minnesota's pro day. But whether he ran 4.19 or 4.29 or 4.39, there's no doubt the former Northern Iowa receiver can run.
"He's fast," was coach Mike McCarthy's first impression from the Green Bay Packers' latest addition at receiver.
The Packers are thin at receiver, with Jarrett Boykin and rookies Charles Johnson and Kevin Dorsey sidelined by undisclosed injuries. That left the "Big Three" of James Jones, Jordy Nelson and Randall Cobb, along with holdover Jeremy Ross, and undrafted rookies Myles White, Alex Gillett, Sederrik Cunningham and Tyrone Walker.
Sinkfield set off a frenzy among Internet draftniks, in particular. According to reports, Sinkfield ran a 4.27 on his first attempt, a 4.19 on his second and stumbled at the start but still ran 4.41 when scouts asked him to run again. The 4.19 was faster than Chris Johnson's Scouting Combine-record 4.24.
The Vikings' director of college scouting, Scott Studwell, told the St. Paul Pioneer Press that he had Sinkfield as running in the "high 4.3s."
Either way, Sinkfield got some much-needed publicity after a nondescript career at Northern Iowa. As a senior, he caught 43 passes for 499 yards and four touchdowns, with a long gain of 32 yards. For his career, he caught 76 passes for 1,097 yards and 10 touchdowns, posting an average of 14.4 yards per reception.
"It was crazy initially when it first came out and how it blew up on social media," Sinkfield said after Tuesday's organized team activities practice. "There was a lot of good publicity from it, just coming out of Northern Iowa and not really having that much stats. It really got my name out there for teams to actually take a look at me."
Based on his ho-hum stats in the second-tier Missouri Valley Conference, Sinkfield's pro day was just what he needed to give himself a shot at the NFL.
"I knew going into my pro day that my athletic ability and numbers were going to be up to par," he said. "It was about getting teams to notice me and know who I am. I needed it because my name wasn't really out nationwide."
Sinkfield wasn't drafted but he landed with the Miami Dolphins, where he spent about four weeks before being released on May 28. With Joe Philbin and Mike Sherman heading the Dolphins' coaching staff, Sinkfield might be late to Green Bay but is in pretty good shape with the playbook.
He's got his foot in the door. All he wants is an opportunity.
"Yes, sir," he said. "I'm happy to be here and blessed. That's all I need."
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Bill Huber is publisher of Packer Report magazine and PackerReport.com and has written for Packer Report since 1997. E-mail him at email@example.com, or leave him a question in Packer Report's subscribers-only Packers Pro Club forum. Find Bill on Twitter at twitter.com/PackerReport.