Robert B. Parker: Mortal Stakes

From the Publisher:
Everybody loves a winner, and the Rabbs are major league. Marty is the Red Sox star pitcher, Linda the loving wife. She loves everyone except the blackmailer out to wreck her life.

Is Marty throwing fast balls or throwing games? It doesn't take long for Spenser to link Marty's performance with Linda's past... or to find himself trapped between a crazed racketeer and an enforcer toting an M-16.

America's favorite pastime has suddenly become a very dangerous sport, and one wrong move means strike three, with Spenser out for good!

Robert B. Parker: Mortal Stakes. Bantam, ISBN: 0440157587 (April, 1983), 328 p., $7.99.