Lyng failed to command a place on the starting fifteen during the 2010 Leinster Championship. In spite of this he won a ninth Leinster Championship medal as an unused substitute on 4 July 2010 following Kilkenny's 1–19 to 1–12 defeat of Galway. On 5 September 2010, he was selected on the substitutes' bench when Kilkenny faced Tipperary in the All-Ireland final. Lyng was introduced as a substitute for Cha Fitzpatrick at midfield and scored a point in the 4–17 to 1–18 defeat.