The attacking midfielder only moved to Spurs last summer from Fulham and says he was preparing himself for another season under Andre Villas-Boas after notching 12 goals during 2012-13.
However, Dempsey stated Seattle Sounders "moved mountains" to get him to complete a £6 million move to the MLS and is excited to return to his native country.
| DEMPSEY ON MLS RETURN
|1/2||Gareth Bale is 1/2 with Paddy Power to leave Tottenham this summer
"The right situation came along. The MLS and the Seattle Sounders moved mountains to get me back and I wanted to come back when I could still do it. I didn’t want to come back when I was past it because I wanted to make an impact.
"I don’t know what my effect will be so we will just have to wait and see. I am looking forward to getting back and playing more of the style of football I fell in love with - the South American style, being more creative on the ball and having that little bit more freedom to try things."