It was not that long ago that the SF Giants expected Marco Luciano and Luis Matos to be part of the next wave of prospects in San Francisco. Now, they will enter next spring with a precarious hold on a roster spot, as they will have likely exhausted all their option years.
Pair of former SF Giants prospects to have precarious hold on roster spot next spring
I say likely because teams will often request a fourth option year for players. That is granted on a case-by-case basis, but it does happen.
According to the rule, Luciano and Matos have burned three option years apiece.