First off, get a new mechanic. Fast. The idea of putting pliers on a cam to hold it in place makes my skin crawl... I would not let him anywhere near your engine.
Now, to answer you question. It looks like your "mechanic" was smart enough to at least clamp down the pliers on a part of the cam where it does not make any contact with the journal bearings. So, yes, based upon your crappy cell phone pic, it appears your camshaft can be reused. I would make sure that it is deburred so no metal chunks break off.