BALTIMORE (AP) Ravens tight end Benjamin Watson has torn his right Achilles tendon and is likely lost for the season.

The injury occurred on Baltimore's first offensive play in a preseason game against the Detroit Lions on Saturday night.

Watson appeared to trip while running a pattern and slumped to the turf. After he finally got up, he had to be helped off the field.

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Signed as a free agent in March, Watson was expected to be a key element in the Ravens' passing game. He had 74 catches for 825 yards and six touchdowns last season with New Orleans.

The 35-year-old broke into the league in 2004 with New England and played with Cleveland from 2010 through 2012 before going to the Saints.

He has 434 catches for 4,963 yards and 38 touchdowns in 163 games.

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AP NFL website: www.pro32.ap.org and http://twitter.com/AP-NFL