After retiring from professional football, Martin became an entrepreneur, and founded two real estate start-up companies in central Texas.

Despite its inexperience, the Cardinal offensive line allowed a Pac-10-low seven sacks on the year, enabling Stanford's freshman quarterback Andrew Luck to lead the conference in passing efficiency at 143.47.

[7] Fellow linemen DeCastro and center Chase Beeler also received All-America recognition, as the Cardinal offensive line allowed just six sacks on the season, the second fewest in the FBS behind only Air Force.

[16] During his rookie season, Martin started at right tackle from the beginning of training camp and struggled early in preseason with giving up sacks and penalties.

[18][19] In December 2012, Martin was moved over to left tackle to take over for Pro Bowler Jake Long, who had been placed on injured reserve with a torn triceps.

It was initially reported that he had been mistreated by some teammates during lunch that day when they asked him to sit with them, but then promptly got up and left the table when he sat down.

[27][28] On November 2, it was reported that Richie Incognito's ring-leading role in the harassment of Martin dating as far back as the 2012 season was being reviewed by the NFL Players Association.

Until obtaining the tape from Martin's legal team, the Dolphins had publicly maintained the charges against Incognito were pure speculation.

[36] On November 5, the Sun-Sentinel reported that the message that ultimately led to Incognito's suspension was made after Martin missed two days of the team's voluntary workout program.

[38] In February 2014, a 144-page report by Ted Wells—an attorney hired by the NFL to investigate the scandal—found that Incognito and fellow linemen John Jerry and Mike Pouncey "engaged in a pattern of harassment" toward Martin, another offensive lineman, and an assistant trainer.

[43] One month later, he posted a message to Facebook describing mental health struggles and suicide attempts as among additional factors in his decision to leave the sport.

[44] Soon after retiring, Martin returned to Stanford to complete his degree and spent several months as a national spokesperson for Beyond Differences, a group focused on creating a more inclusive community and combatting bullying in middle and high schools in the Bay Area.

[45] On February 23, 2018, Martin was taken into police custody following a post to his Instagram account with an image of a shotgun and a caption that read: "When you're a bully victim & a coward, your options are suicide, or revenge.

[48] In October 2019, Martin entered into a diversion program while receiving praise from Los Angeles Superior Court Judge Richard Kirschner, who stated he “independently made efforts to address his issues and did frankly an excellent job in bringing himself to a state of stability and good mental health.” In October 2021, Martin completed the diversion program, and all criminal charges were dismissed.

[54] The same year, he also enrolled into a Masters in Finance and Real Estate program at Georgetown University, graduating with a 3.8 GPA in December 2022.