WEST PALM BEACH, Fla. (AP) Hall of Famer Craig Biggio hopes increased labor tension doesn't lead to Major League Baseball's first work stoppage in a quarter century.

"Hopefully ownership knows and players know that nothing good's going to come of it," Biggio said Tuesday at Houston Astros training camp, where he will serve as a guest instructor for the next week.

Baseball's labor contract runs through 2021. Players have increasingly complained about the second straight slow free-agent market, and their union has proposed major economic changes mid-agreement. Stars Bryce Harper, Manny Machado, Craig Kimbrel and Dallas Keuchel remain unsigned with spring training underway.