ALLEN PARK —  Martin Mayhew, the Lions general manager, said today he thought Saturday’s preseason loss to Cleveland was hard to judge offensively because the top three receivers (Calvin Johnson, Bryant Johnson and Dennis Northcutt) did not play due to injury.

Mayhew said quarterback Matthew Stafford did nothing that surprised him. He knows all eyes are on Stafford who is trying to win the starting job over Daunte Culpepper. Stafford has thrown an interception that was returned for a touchdown in each of his first two preseason games.

“Any time you draft a guy first overall I think there’s a high level of expectation and I think that Matthew has done some things that have been really exciting, people have seen him do some things that are really exciting on the practice field and on the game field,’’ Mayhew said. “You want to see that consistently every single play and that’s something to be excited about. He has a chance to be a really, really good player. We just have to develop him and put good players around him.’’

   Two roster moves were made today. Rookie free agent receiver Kenneth Harris, who injured his ankle last week, was placed on the waived/injured list. To take his place the Lions signed rookie free agent running back and return specialist Tristan Davis who played at Auburn.

— PAULA PASCHE