The Big Hit: Murph & Markus celebrate Opening Day, preview the official start of the Buster Posey era, and take some calls from Giants fans

<p>The Big Hit: Murph &amp; Markus celebrate Opening Day, preview the official start of the Buster Posey era, and take some calls from Giants fans</p>

Every weekday morning, KNBR listeners join Brian Murphy and Markus Boucher from 6am-10am only on KNBR!

<p>Every weekday morning, KNBR listeners join Brian Murphy and Markus Boucher from 6am-10am only on KNBR!</p>

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