Sonoma County Roller Derby Wine Country Wreckers' jammer Annette Gray(1369), who skates under the name Smk A Roni Ann Cheese, rests on the bench in between her time to jam against Resurrection Roller Derby at the Grace Pavilion August 31 in Santa Rosa. The jammer is the points scoring mechanism on the floor, like a human ball, receiving one point for every opponent lapped. There are often 3 jammers, one rotating into every third jam to attempt to score points for their team. [Joseph Barkoff/WKU PJ]