What's in a number? HoustonTexans.com is taking a look back at the numerical roster of the franchise, and going over every number that's been worn in team history. From the memorable ones like 99, 80, and 4, to some that might not ring a bell, we've got them all covered.

QB AJ McCarron, 2019-Current

The backup quarterback to Deshaun Watson, McCarron started Week 17 of the 2019 season against Tennessee. Watson and numerous other starters watched from the sidelines as Houston had already clinched the AFC South the week before in Tampa Bay, and couldn't move up or down in the playoff seeding against the Titans.

On the game's opening drive, he guided the Texans offense down the field for a touchdown. It was the only time all season Houston found the end zone on the first possession.

In 2019, McCarron completed 21-of-37 passes for 225 yards. That came in a pair of appearances, and he was picked off once and sacked five times.

Before Houston, McCarron spent 2014 through 2017 with the Bengals. In 2018 he played in two contests for the Oakland Raiders.

QB T.J. Yates, 2017 (also wore #13 and #6)

In his third and final stint with the Texans, Yates donned the number two for the final four games of the 2017 campaign. He entered the Week 14 loss at home to the 49ers in place of an injured Tom Savage, tossed a pair of touchdown passes to DeAndre Hopkins, but Houston fell to San Francisco.

Yates started the last three games of that season, and would finish the year with 523 passing yards, four touchdown passes and three picks.

He is currently a Texans assistant coach.

QB B.J. Daniels, 2015

Daniels was a part of the 2015 quarterback carousel that saw seven different Texans attempt a pass in 2015. Houston won the division with Brian Hoyer, Ryan Mallett, T.J. Yates and Brandon Weeden all starting games under center, and in the final two weeks of that campaign, Daniels played quarterback and special teams on a few select plays.

In a Week 16 win at Tennessee, Daniels ran the Wildcat offense, rushing six times for a total of six yards, and completing 1-of-2 passes for seven yards.

In the season finale, he returned four punts for a total of 18 yards.

Daniels had appeared in six games earlier that season with the Seahawks. It was the only campaign in which the University of South Florida product played games in the NFL.

P Brett Hartmann, 2011

Hartmann was the team's punter and kickoff specialist for the first dozen games of the 2011 season. He punted 58 times, averaging 44.4 yards per, and 15 were downed inside the opponents' 20-yard line.

On kickoffs, 23 of his 50 resulted in touchbacks.

He was injured in the team's Week 13 victory over the Falcons in Houston.

2011 was the lone season in the NFL for the Central Michigan product.