The Brewers finalized a six-player trade with the Arizona Diamondbacks on Saturday and added three players likely to play major roles with the big-league club. Milwaukee received former All-Star catcher Johnny Estrada, right-handed starter Claudio Vargas and right-handed reliever Greg Aquino for steady left-handed starter Doug Davis and a pair of prospects, lefty Dana Eveland and outfielder David Krynzel. The centerpiece of the deal from Milwaukee's perspective is the 30-year-old Estrada, who has batted better than .300 with at least 70 RBIs in two of his three seasons as a starting catcher, first with Atlanta and then Arizona. He likely will bump 37-year-old Damian Miller, who battled a myriad of injuries in 2006, to a reserve role. Miller exercised a player option and will be in the final year of his contract in 2007.