Mariners GM Jack Zduriencik has exasperated many trade partners with his negotiating style, executives tell Ken Rosenthal and Jon Paul Morosi of FOX Sports. Those execs say the M’s frequently inquire on a number of players, only to shift direction when a deal appears within reach. That’s not unusual for teams to do, but rival officials say Jack Z has become one of the most difficult GMs in the sport with whom to do business. In a lengthy email to FOX Sports, the Mariners GM responded by saying that the in-and-out nature of his trade conversations are typical of those that occur throughout the industry. Meanwhile, other teams are confused by the club’s recent acquisition of Kendrys Morales given the way Zduriencik has intimated that the club has limited financial breathing room. Here’s more out of the AL and NL West..