Through two preseason games, Taylor has completed 13 of 26 passes for 99 yards, zero touchdowns and a pair of interceptions.
The two picks came Thursday against the Eagles, including one intended for Anquan Boldin that found the waiting arms of former Bills cornerback Ronald Darby.
Following Taylor's underwhelming 8-of-18 effort, McDermott made something of a vague comment to reporters about assessing quarterback play.
"We're always going to evaluate everything and that goes for every position including the quarterback position," McDermott said after the loss, according to Chris Brown of the team's official website. "We're going to evaluate the film. I'm going to evaluate the job I did and then we evaluate the job that each of us and continue to get better as a unit."
However, McDermott later clarified his comments and told the Buffalo News' Vic Carucci he is not considering a change under center.
Taylor will have a chance to quell concerns about his shaky preseason play Aug. 26 when the Bills travel to M&T Bank Stadium for a meeting with the Baltimore Ravens.