Players and staff members separated the defenders after they shoved each other, sending Gatorade flying in the process.
Jackson, a 27-year-old defensive tackle, earned his first career Pro Bowl selection by recording eight sacks entering Week 16. Colvin has provided depth to the NFL's premier passing defense.
The 4-10 49ers stunned the 10-4 Jaguars by opening Sunday's matchup with 10 unanswered points. Although the sluggish start might have frustrated two members of a unit used to dominating, the Jaguars still clinched the AFC South when the Tennessee Titans dropped a 27-23 loss to the Los Angeles Rams.