ANN ARBOR – Michigan’s football team heads into its second bye week at 7-2 after Saturday’s 21-16 win over Purdue, but it was an uneven performance from the Wolverines against a reeling Boilermakers team that has lost 15 straight conference games. Michigan received an overall grade of 76.8 from Pro Football Focus – its third-lowest game score of the season. An average mark is between 60-69. The defense, which held Purdue to 276 yards, fared better than the offense, earning a 78.4 mark. Here are Michigan’s snap counts from Saturday, its best and worst performers, plus other notable grades and trends: *PFF evaluates every player on every play in multiple facets of the game, such as passing,...