Cuban pitcher Aroldis Chapman in great demand

The Aroldis Chapman market is going to be interesting to judge. The Mariners are the latest team to jump seriously into the bidding, possibly hoping to have another front-line arm so they can deal Felix Hernandez (above) before he reaches free agency. The Cubs and White Sox have expressed interest, but it's unclear if they have the resources to compete with the Yankees, Red Sox, Cardinals, Mets, Tigers, Orioles and others for the Cuban with the 100 mph fastball. … Bobby Valentine may be shut out on the job market. He was a finalist for the Indians job that went to Manny Acta , and it appears the Nationals are close to giving former Cubs manager Jim Riggleman the job he had on an interim basis last season. … Pedro Martinez hinted Thursday he might retire if the Phillies win the World Series. The Cubs were among a handful of teams that had interest in him before he signed with the Phillies. … White Sox center fielder Jordan Danks and Cubs shortstop ...