Autographed Soccer Balls Detroit Rockets. Rare Vintage 1990s Detroit Rockers Multi-Signed Soccer Ball Lot (NPSL Indoor Soccer). Up for sale is an awesome piece of Michigan sports history! This is a 2-ball vintage lot featuring authentic player autographs from the defunct Detroit Rockers professional indoor soccer team, which played out of the Joe Louis Arena and the Palace of Auburn Hills in the National Professional Soccer League (NPSL). These balls date back to the mid-1990s era (circa 1996) and include printed team sponsor graphics like the iconic Little Caesars logo and the classic Detroit Rockers team crest. Key Player Signatures Identified on the Balls. Bryan “Goose” Finnerty (#22). Longtime star goalkeeper, NPSL Rookie of the Year, and team legend! Dennis Brose (#21) – Hall-of-fame caliber indoor scoring machine (574 career indoor goals). Lars Richters (#6) – Fan-favorite Rockers defender and local Michigan soccer icon. Bronn Pfeiffer (#5) – Talented Rockers midfielder. Includes a few additional stylized autographs as shown in the photos! These are vintage promotional / youth souvenir soccer balls (Size 5 / Vectra branding). The balls are currently deflated/flattened and exhibit typical vintage surface wear, light scuffing, and minor coloration changes expected of 30-year-old sports memorabilia.