He actually didn't gross $92k. That's not only unrealized stock options, it also assumes he'd stay in Facebook for next 3 years. He actually grossed 1/4th of that, given he stays in Facebook till end of first year.
Facebook vests quarterly - there actually isn't a one year cliff. In the last picture, salary + signing bonus + (4 * Quarterly RSU) + expected year end bonus gives you the total pay for the first year.