Brock Purdy sets a Next Gen Stats record for completion percentage

Photo by Michael Owens/Getty ImagesNext Gen Stats has a passing metric called Completion percentage over expected. It’s a derivative of completion probability, which measures the success of a pass relative to the difficulty of the throw. It’s worth noting that this CPOE adjusts for dropped passes.

Against the Cardinals on Sunday, 49ers quarterback Brock Purdy had a CPOE of +28%, which was the highest mark by a quarterback with at least 20 passing attempts over the last seven plus seasons. To add perspective about how well Purdy played, his previous career-high in CPOE was +5.1%.

A look at Purdy’s passing chart shows he had five completions of at least 10+ yards. When you look at a few other…