These are the updated contracts for the three players listed. In order to get the 60% Prospect Extensions Discount for Xander Bogaerts, the contract must be for 5 years, a 3 year contract would be calculated at 100% of the amount listed in the Extension Vaules Scale--which is $9.5m.
The A's will extend contracts on following players:
MI Bogaerts, Xander P-.5M (2017) $5.5M (2022) #10 in 2015
RP Maurer, Brandon $ 1.5M (2017) $ 1.5M (2020) #44 in 2017
SP Zimmerman, Jordan $ 5M (2017) $6.5M (2020) #30 in 2015