Later continued his academic and athletic abilities at Oxnard College in Oxnard, California.
Professional career
Marion Mayhem
In 2009, Tatum joined the Marion Mayhem as a wide receiver and return man. After a 61-57 comeback win over the Wheeling Wildcats, Tatum was named the CIFL Special Teams Player of the Week. After 6 games with the Mayhem in 2010, the team folded for financial reasons. At the time Tatum was leading the Mayhem with 20 catches for 243 yards and 3 touchdowns. Tatum also had 23 kickoff returns for 500 yards and 2 touchdowns.
After the season abruptly ended for the Mayhem, Tatum, as well as a few other Mayhem players, signed to play with the Fort Wayne Firehawks, also of the CIFL. Tatum was able to return one missed field goal for a touchdown in the final game of the season against the Chicago Cardinals. In his two games for the FireHawks, he had 2 catches for 19 yards and a touchdown, as well as returning one kickoff for 21 yards. For his efforts on the season, Tatum was rewarded with the CIFL's Special Teams Player of the Year award.
Marion Blue Racers
In 2011, the city of Marion got a new indoor football team in the form of the Marion Blue Racers. Owned by former Pittsburgh Steeler, LaMonte Coleman, the team quickly gained momentum by signing Tatum and other great indoor football players. He was twice named the CIFL Special Teams Player of the Week. The team went on to a record 8-2 regular season, during which Tatum racked up 23 kickoff returns for 568 yards and 2 scores, and again won CIFL Special Teams Player of the Year honors. He led the Blue Racers with 26 catches for 310 yards and 11 touchdowns. He also rushed for 2 touchdowns and threw for another. Tatum re-signed with the Blue Racers for the 2012 season, as they transitioned into the UIFL.
Everett Raptors
In 2012 Mike Tatum signed to play with Indoor Football Leagueexpansion team Everett Raptors. The team ultimately finished 5-9, Tatum was named IFL Special Teams Player Of The Week 2 times, including week 3 and week 12. Playing in only 12 games, due to injury, he racked up 1015 kick return yards on 48 attempts, averaging 21.1 yds per return and also had 5 kickoffs returned for touchdowns. He tied the record for the longest return at 48 yards. Tatum also had 23 receptions for 325 yards averaging 14.1 yds per game. His longest reception was 41 yards. He also had 5 receiving touchdowns. Tatum rushed for 28 yards and a score on 16 attempts. Tatum finished the season second in all purpose yards with 1478 and 11 total TDs Tatum's efforts were good enough to earn him 2012 IFL Special Teams Player of The Year honors.
Tatum signed with the Sioux Falls Storm, also of the Indoor Football League, for the 2013 season.
Marion Blue Racers
Tatum re-joined the Blue Racers for the 2014 season.
Sioux Fall Storm
After the Blue Racers season ended, Tatum re-joined the Storm. Tatum enjoyed a 2015 season that saw him finish 7th in the IFL in All-purpose yards. Tatum returned to the Storm for 2016. On October 16, 2017, Tatum re-signed with the Storm.
Bismarck Bucks
On January 28, 2019, Tatum signed with the Bismarck Bucks.
