Comeback season is officially on for 2012 Heisman Trophy winner Johnny Manziel. Due to a number of circumstances, Manziel did not have a great tenure in the NFL. He was selected by the Cleveland Browns with the No. 22 overall pick in 2014. However, Manziel was out of the league in 2016. Now, he has resurfaced with the Hamilton Tiger-Cats in the CFL after signing a two-year deal over the weekend. Manziel made his first on-field appearance on Sunday. Surprisingly, it wasn't with the New England Patriots [VIDEO].

Tiger-Cats have competition at quarterback

Despite winning the Heisman as a redshirt freshman, Manziel is not the most accomplished college quarterback on the roster.

Although he is coming into the organization with the mission of starting in the season-opener, Manziel must earn the job on the practice field. That might not be as easy as it sounds. He has less than a month to get acclimated to the offense.

Last season, Jeremiah Masoli produced at a relatively high level for the Tiger-Cats. Masoli threw 15 touchdown passes, while completing over 63 percent of his pass attempts. Masoli also threw for 3,177 yards in 12 games. Masoli also threw 15 touchdown passes during the 2016 season. However, he also threw 12 interceptions in 10 games. Therefore, it was great to see Masoli curtail his interception woes in 2017. He finished the year with five interceptions. As a result, Manziel must take care of the ball to win the starting job.

The quarterback with the most interesting upside joined the Tiger-Cats in February.

Vernon Adams Jr. played his first two CFL seasons with the Montreal Alouettes and Saskatchewan Roughriders. Adams attempted 75 passes during his rookie season. Unfortunately, he only took a few snaps with the Roughriders in 2017. As a result, Adams is coming into his third season with four touchdown passes. He has already been traded twice, so Adams hoped the Tiger-Cats would be a perfect place to vie for a starting position. Instead, he has some of the most talented quarterbacks ready to contend for playing time.

Overall, the Tiger-Cats have five quarterbacks on the roster. Dane Evans and Bryant Moniz round out the rest of the unit. Moniz threw for over 10,000 yards in college with the Hawaii Warriors. He is the veteran of the group and should provide stability. Meanwhile, Evans threw 11,680 yards in four seasons with the Tulsa Golden Hurricane. Evans also completed 84 touchdown passes during his college career.

Is this Manziel's final chance to succeed?

When Manziel left the Texas A&M Aggies, he wasn't ready for the bright lights of professional Football.

In two seasons with the Aggies, Manziel accounted for 63 touchdown passes and 22 interceptions. He also completed 69 percent of his pass attempts in two seasons. Moreover, Manziel scored 30 rushing touchdowns in college. However, his gaudy numbers did not translate into NFL success.

The Browns were (2-6) when Manziel started games. In retrospect, two wins is fairly impressive for the Browns' organization. However, Manziel produced 7 touchdowns and 7 interceptions in two seasons. He also didn't study the playbook when he played with the Browns. Moreover, off the field issues became a huge problem [VIDEO], leaving the Browns no choice but to release Manziel in 2016. Now, Manziel has another opportunity to get back on the field. He has reshaped his life and seems to be ready to flourish on the field.