The Penguins replaced one fourth-liner with another when the free-agent signing period opened Sunday. Right wing Arron Asham left the Penguins for the New York Rangers. Moments later, the Penguins signed winger Tanner Glass to a two-year, $2.2 million contract. Asham signed a two-year, $2 million deal with the Rangers. Asham wanted to return to the Penguins, but he said he was never given an offer. “I couldn’t lay all my eggs in one basket,” he said. “I had to look around.” In Glass, the Penguins have secured the services of a similar but younger player.