COOPERSTOWN, N.Y. — Three pitchers who became dominant after trades and a rock-solid catcher-turned-second baseman entered the Baseball Hall of Fame on Sunday. Randy Johnson, Pedro Martinez, John Smoltz and Craig Biggio basked in the moment, with at least 40,000 fans cheering them one more time. Smoltz, signed by his hometown Detroit Tigers after being selected on the 22nd round of the 1985 amateur draft, was dealt to Atlanta for veteran Doyle Alexander in August 1987.