Keenan Allen caught his lone target for 15 yards in Sunday's third preseason game at San Francisco.
Several Chargers teammates have noticed increased speed from Keenan Allen in 2014 training camp.
Keenan Allen has focused on improving his speed this offseason.
Former NFL scout Matt Williamson says Keenan Allen "could be close to his ceiling already."
Keenan Allen grabbed six catches for 142 yards and two touchdowns in San Diego's playoff loss to Denver.
Keenan Allen caught two balls for 21 yards in the Chargers' Wild Card round win over the Bengals.
Keenan Allen caught five balls for 89 yards in the Chargers' Week 17 win over the Chiefs.
Keenan Allen said he seriously considered quitting football when he wasn't getting snaps early in the year.
Keenan Allen caught three passes for 36 yards and one touchdown in Sunday's Week 16 win over the Raiders.
Keenan Allen (shoulder) is listed as probable for Week 16.
Keenan Allen (shoulder) is practicing in full for Week 16.
Both of Keenan Allen's catches went for touchdowns in San Diego's Week 15 win over the Broncos, as the sensational rookie wideout finished with 29 yards.
Keenan Allen (shoulder) is active for Week 15 against the Broncos.
Keenan Allen (shoulder) is listed as probable for Thursday night's Week 15 game against the Broncos.