D.T. In 'Dawg Territory' (1988)

Somewhere in deep space there is a planet where sports and friendship mirror their value here on Earth. From this planet comes a traveler by the name of D.T. an alien dog who has been kidnapped in an attempt to sabotage his teams chances at winning the Fetchball Championship. After being dropped in the recesses of Municipal Stadium in Cleveland, Ohio, D.T. teams up with the Cleveland Browns in a desperate attempt to return home in time for the big game. However, while the Browns try and help D.T. an even larger threat looms over the City by the Lake. An alien invasion is taking place, threatening the lives of everyone. With D.T.'s help the Cleveland Browns must fight off the Alien Queen as she tries to takeover Earth and rule its people.