Okert was added to the Giants' 40-man roster Friday, Andrew Baggarly of the Bay Area News Group reports.
While Okert took a step back with his control in 2015, issuing 29 walks in 61.1 innings, he showed the Giants enough to warrant protection from the Rule 5 draft. He struck batters out at a 10.1 K/9 clip and posted a 1.26 ERA in 10 appearances in August.