Day registered 16 combined tackles, a sack, and a pass defensed in six game appearances with San Francisco last season.
Pro Football Focus was high on Day coming out of college. During his senior year with the Fighting Irish, he had PFF's top production grade among defensive tackles.
"As a one-gap penetrator on the interior, there aren't any better in this (draft) class," wrote the PFF Analysis team in February of 2016.
The analytics site is eager to see what he can do with the 49ers in 2018. Day is listed among 10 NFL players who PFF wants to see more of this coming season. The list consists of players who "either impressed in limited work last season, saw their seasons cut short by injury or impressed at the college level enough that we still think they can make an impact in the NFL."
Gordon McGuinness wrote the following of Day:
"Drafted by the Jacksonville Jaguars in the fourth round of the 2016 NFL Draft, Day was cut midway through the 2017 season, with his release coming after an impressive performance against the Indianapolis Colts where he delivered as a pass-rusher and against the run. With 12 tackles resulting in a defensive stop, he will look to make an impact for the 49ers in 2018, with his biggest struggle perhaps coming with where he fits on the San Francisco defensive line. With Arik Armstead, DeForest Buckner and Soloman Thomas, the 49ers are stacked with players of a similar physical stature."
49ers defensive coordinator Robert Saleh believes the Jaguars' depth along the defensive line and roster needs were the reasons why the team waived the young player after just over a season-and-a-half in Jacksonville.
"He's a really good inside three-technique," said Saleh in November. "He's got a tremendous skill set that we like. The speed and quickness and the ability to penetrate off the ball. He's actually a good piece, and that's why he made it this long.
"[Jacksonville] did everything they could, I'm sure, to keep him. When injuries start happening it becomes a numbers game. There's no way, I'm sure, they could justify keeping him. Especially with the amount of D-line talent they have."
Day is signed through the 2019 season.
H/T to Patrick Tulini for the find.
More San Francisco 49ers News
-
49ers vs. Colts PFF grades: Best and worst from the game, plus snap counts
The San Francisco 49ers improved their record to 11-4 after a 48-27 win against the Indianapolis Colts in Week 16. Today, Pro Football Focus released its grades and snap counts from the game. Which Niners stood out, and who needs more work? Highest-graded 49ers:... -
49ers vs. Bears PFF grades: Best and worst from the game, plus snap counts
The San Francisco 49ers improved their record to 12-4 after a 42-38 win against the Chicago Bears in Week 17. Today, Pro Football Focus released its grades and snap counts from the game. Which Niners stood out, and who needs more work? Highest-graded 49ers: Offense Luke... -
49ers add explosiveness to offense in PFF's 2026 NFL mock draft
The San Francisco 49ers are expected to pursue a veteran wide receiver in free agency, especially with Brandon Aiyuk's time in the Bay Area appearing to wind down. But head coach Kyle Shanahan and general manager John Lynch may also use the 2026 NFL Draft to add another weapon... -
49ers vs. Bears injury update: George Kittle remains a game-day decision
San Francisco 49ers tight end George Kittle did not practice this week as the team prepares for its Week 17 matchup against the Chicago Bears, leaving his status up in the air heading into Sunday. Despite the lack of on-field work, the 49ers remain optimistic that the All-Pro...