Carroll: Sherman played 2nd half of season with knee injury

(AP) — Seattle Seahawks cornerback Richard Sherman played the second half of the season with an injured knee, although he was never listed on any injury report.Seattle coach Pete Carroll said Monday that Sherman had an MCL injury in his knee, similar to the ones suffered by quarterback Russell Wilson and wide receiver Tyler Lockett earlier in the season.Carroll called the injury "significant" on his weekly radio show on KIRO-AM Monday morning and expanded on the situation later in his end-