Week 15 NFL Preview: Playoff positioning on the line

CNN  — 

The end of the NFL season is quickly approaching.

There are just four weekends of regular season play left and with playoffs just around the corner, the stakes climb higher with every matchup.

Last week, the Philadelphia Eagles (12-0) became the first team to clinch a playoff spot by defeating the New York Giants (7-5-1). On Thursday night, the 49ers (10-4) took hold of the NFC West, riding the recent success of rookie quarterback Brock Purdy.