Toward the end of last week, UCLA linebacker Myles Jack traveled to Indianapolis to undergo further medical evaluations on his right knee. In terms of his ability to play football, Jack is a top-10 prospect, but after missing most of his final college season with a torn anterior meniscus, his NFL career trajectory remains in doubt.

After those evaluations, CBS Sports' draft analyst Dane Brugler reported that "some around the league are worried about the long-term health of Jack's knee." Then, on Monday, Les Bowen of the Philadelphia Daily News reported that an NFL source views Jack and his knee as a "time bomb."

Jack's agent, John Thornton, apparently saw those tweets. Because a few hours later, Thornton used Twitter to take a shot at those anonymous medical reports that could end up hurting his client's draft stock. In the process, Thornton also ripped the NFL for its handling of concussion data. 

Then, perhaps as a form of proof, Thornton posted footage from Jack's Saturday night workout with the Jaguars. Based on the video, Jack doesn't lack any explosion, even after the injury.

Thornton didn't stop there. When an account called On the Clock Draft retweeted that video along with the following words: "Myles Jack looks fine right now, worry for some teams is how long his knee will hold up in the NFL," Thornton replied by taking a shot at the validity of those medical reports. 

In short, Thornton argued that if a team's doctor doesn't know if Jack has the ability to play for 10 games or 10 years, then that team might want to hire a new doctor. The second part of the tweet most likely refers to the anonymous nature of the report. 

For what it's worth, all five of our mock drafters envision a team selecting Jack within the first 10 picks of the draft. Two of them see Jack going to the Jaguars. 

Jack has the talent to play in the NFL, but questions about his knee remain. (USATSI)