"First I want to start off by telling the Auburn Family that I appreciate them and I love them, and I love playing for Coach (Gus) Malzahn," he said.
"This was a dream come true by coming to Auburn," Mason said. "After all the thought, talking to my family and my friends, my mom and dad talked to me over and over again...having lots of conversations with them, I just want to say I am declaring for the 2014 draft."
Mason thanked his coaches at Auburn and noted that he also received advice on his decision from Malzahn, who had high praise for the running back on Thursday.
"I would like to congratulate Tre," Malzahn said. "Our staff is extremely proud of him. I recruited Tre and going to the NFL was a goal of his. I am very proud of Tre to reach that.
"He did a wonderful job for us, not just this year, but his whole career--not just the way he played football, but the way he represented Auburn," Malzahn said.
"I am very proud of him," the coach added. "It is a big day for him, it is a big day for Auburn."
In the fourth quarter of Auburn's 34-31 BCS Championship Game loss to Florida State mason moved to No. 1 on the Auburn list for rushing yards in a single season with 1,816, breaking the old mark set by Bo Jackson in 1985 by 40 yards.
In that game Mason rushed for 195 yards and a touchdown and he also caught a touchdown pass. Mason's total of 2,374 all-purpose yards for the 2013 season is the most by any player in Auburn history.
Mason also set Auburn single-season records for points scored with 150, touchdowns (25) and rushing touchdowns (23). With 35 touchdowns in three seasons, Mason is No. 3 in career touchdowns at Auburn and number four in rushing touchdowns with 32.
The running back also improved from eighth to sixth on AU's career rushing yardage chart with 2,979, passing Fullwood (2,789 yards from 1983-86) and Stephen Davis (2,811 yards from 1993-95). Mason's total is the highest for any AU player at the end of his junior season.
Mason rushed for 304 yards vs. Missouri and was the SEC Championship Game's Most Valuable Player.
He also moved from eighth to seventh in career rushing attempts. With 516 he moved past Davis and finished 10 behind Stacy Danley (1987-90).
Mason credited the line with making the Tigers a strong running team this year. "Our O-line is great," he said. "I couldn't do half the things I did without those guys. They start it for me and then I have to do my thing by finishing it off by running over linebackers and making safeties miss."
Malzahn said that the NFL team that signs him will be getting a player with a great work ethic. Mason said he sees himself as that type of guy.
"I feel like they will get somebody that's a hard-worker, willing to do whatever it takes to win," he said. "My mind's not just set on money, it's set on championships. I have yet to win a (national) championship and my mindset's not going to change. I still want to, God willing I will win a championship at the next level."