The Kansas City Chiefs (2-2) enter the bye week after wins over the San Diego Chargers and New York Jets, with alternating losses to the Houston Texans and Pittsburgh Steelers. 

Here are nine stats to know through the first four games of the season:

1.       Andy Reid pretty successful after the bye week

In his career, Chiefs coach Andy Reid has a record of 15-2 after the bye week, including wins the past two years over the San Diego Chargers (23-20) in 2014 and the Denver Broncos (29-13) last year.

With a win next Sunday, Reid would also pass his mentor, Mike Holmgren, on the NFL's all-time wins list. Reid currently has 174 career wins and is tied with Holmgren for 14th on the all-time list. 2.       Marcus Peters is a pick machine

Through the first four games of the season, second-year cornerback Marcus Peters has picked off an NFL-leading four passes so far this year, two of which came in the end zone.

As a defense overall, the Chiefs have forced 10 total takeaways, which rank second in the NFL.

Peters is also tied for the NFL lead with Oakland's David Amerson and Washington's Josh Norman with eight passes defensed.

3.       Defense has stood tall in the red zone

The Chiefs defense ranks No. 2 in the NFL in allowing opposing offenses to score touchdowns once they get inside the red zone just 37.5 percent of the time.

The NFL average is 57.7 percent.

4.       Jamaal Charles is the NFL's touchdown leader since 2013

Despite playing in just 36 games since the beginning of the 2013 NFL season, running back Jamaal Charles still leads the NFL with 38 total touchdowns during that time.

Here's a look at the top five guys:

So far this season, the Chiefs offense has had an average starting field position of the 27.5-yard line, which ranks 18th in the NFL.

On the other hand, the Chiefs defense has faced offenses with an average starting field position of the 32.2-yard line, which ranks 30th in the NFL.

6.       Chiefs vs. AFC West under Reid

With the next Chiefs game after the bye week coming against the Raiders, whom the Chiefs beat in both of their meetings last year, Reid will head into that game with a 10-8 overall record in the division, including having won the last six straight AFC West games. 7.       Offense has come up with chunk plays this season

The Chiefs offense ranks No. 3 in the NFL with 62 plays this season of 10 or more yards.

8.       Chris Conley stepping up in his second year

Through just four games this season, Conley has almost eclipsed the production he put up last year as a rookie. Conley has 15 receptions for 172 yards this season, which puts him just two receptions and 27 yards behind his total production all of last season. 

He has really emerged as a solid option on the outside in the passing game for quarterback Alex Smith, who already had established weapons in veteran receiver Jeremy Maclin (20 receptions, 244 yards, 1 TD), tight end Travis Kelce (22 receptions, 220 yards, 2 TDs) and running back Spencer Ware, who ranks No. 4 in the NFL with 483 total yards from scrimmage so far this season. 9.   Alex Smith on pace for historically high passing numbers this season

Through four games this season, Smith has attempted 168 passes, which put him on pace for 672 this season, which would be the fourth most in NFL history and the most in Chiefs franchise history (603, Bill Kenney, 1983).

The franchise record for most completions in a season is 369, which was set by Trent Green back in 2004. Smith is currently on pace for 436 completed passes this season.