Add diet to the list of potential reasons quarterback Colin Kaepernick hasn't been able to find a landing spot so far in free agency.
It's a bizarre explanation considering Bleacher Report's Dan Pompei noted in January that New England Patriots quarterback Tom Brady, one of the greatest players in league history, is a vegan for "most of the year," only adding some lean meat during the winter months.
That said, it's no surprise the barrel of possible reasons for the lack of interest in Kaepernick is already starting to run low. His career numbers are better than those of Mike Glennon, who the Chicago Bears signed to a three-year, $45 million contract early in the free-agent period.
Seattle Seahawks cornerback Richard Sherman said during an appearance on First Take last week he thinks it's clear the former San Francisco 49ers starter is being "blackballed" by NFL owners for his public protest of the national anthem last season, per Sheil Kapadia of ESPN.com:
I'm sure he is. It's difficult to see because he's played at such a high level, and you see guys, quarterbacks, who have never played at a high level being signed by teams. So it's difficult to understand. Obviously he's going to be in a backup role at this point. But you see quarterbacks, there was a year Matt Schaub had a pretty rough year and got signed the next year. So it has nothing to do with football. You can see that. They signed guys who have had off years before.
Darin Gantt of Pro Football Talk pointed out NFL commissioner Roger Goodell downplayed that line of thinking during the league's owner meetings.
"I haven't heard that from our clubs in any way that that's an issue," he said. "My experience in 35 years is that our clubs make independent evaluations of players. They work hard to try to improve their teams. But if they think a player can help improve their team, they're going to do that."
The Cleveland Browns, Denver Broncos, Houston Texans and New York Jets could all still use a quarterback upgrade before the 2017 season.
Kaepernick may be forced to wait until after the NFL draft in late April before the level of interest begins to pick up, though.