The average annual value is $2.1 million. The restricted free agent was eligible to sign since July 1.
"Obviously it's my first time going through something like this," Brown told TSN on Aug. 11. "I don't think it's as stressful as the media would make it out to be. I'm very confident things will get sorted by season time. We'll get it figured out."
Brown, 23, had 36 points (20 goals, 16 assists) in 82 regular-season games and one assist in six Stanley Cup Playoff games last season, his first full NHL season. He has 42 points (21 goals, 21 assists) in 89 NHL games.
Brown was selected by the Maple Leafs in the sixth round (No. 156) of the 2012 NHL Draft.