Rosterbation: Rosales Returns!

With the awkward plate collision yesterday that left Alberto Callaspo with a forearm contrusion, it appears the A's may need another backup infielder.  Hence this:

<blockquote class="twitter-tweet"><p>The <a href="https://twitter.com/search?q=%23Athletics&amp;src=hash">#Athletics</a> have claimed IF Adam Rosales off waivers from the <a href="https://twitter.com/search?q=%23Rangers&amp;src=hash">#Rangers</a>. A corresponding 25-man roster move will be made tomorrow.</p>&mdash; Oakland Athletics (@Athletics) <a href="https://twitter.com/Athletics/statuses/365539162595659776">August 8, 2013</a></blockquote>
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Or, there is also this explanation:

<blockquote class="twitter-tweet"><p>Adam Rosales: Double Agent sent to Texas by Billy. Returns with needed info to secure division.</p>&mdash; Omar G (@omar01) <a href="https://twitter.com/omar01/statuses/365542541124321280">August 8, 2013</a></blockquote>
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In any case, begin the speculation!  The most logical move is Callaspo, but Jerry Blevins has also been struggling. There is another LHP option who could potentially work out:

<blockquote class="twitter-tweet"><p>Also effective Friday, LHP Travis Blackley will be designated for assignment.</p>&mdash; Houston Astros (@astros) <a href="https://twitter.com/astros/statuses/365533737108242434">August 8, 2013</a></blockquote>
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Somewhere, Nathaniel Stoltz is giddy about the latter move.