The Vigilantes have signed four players, including shortstop Brian Grebeck, the younger brother of Toronto Blue Jay and former Angel infielder Craig Grebeck.
Brian Grebeck, 30, played in the Angels' minor league system from 1990-96 and played at Triple-A New Orleans last year.
Also signed was right-fielder Dwaine Bostic, the Dodgers' second-round draft pick in 1992, who played in the Mexican League in 1997.
Mission Viejo came to terms with Randy Curtis, a center-fielder who hit a combined .270 last season while bouncing back and forth from double-A and triple-A in the Cleveland Indians' organization. He also spent time in the minor league system of the Chicago Cubs.
Manny Gagliano, a Texas-Louisiana League all-star third baseman, also agreed to terms. He was selected by the Padres in 1993 and played for Grays Harbor of the Western Baseball League in 1995, where he garnered additional all-star honors.
Vigilantes' Manager Buck Rodgers said the additions of Grebeck and Gagliano are expected to shore up the left side of the infield.