The 25-year-old Hendriks appeared in six games for the Royals this year and allowed 10 earned runs in 19 1/3 innings. He's experienced a lot of success in the Minors, but he hasn't been any able to carry that over to the Majors.
Hendriks provides some additional depth at Triple-A Buffalo, but he likely won't have an opportunity to compete for a job during Spring Training. The native of Australia will instead become part of a backup plan in the event of injuries after he posted a 2.33 ERA in 18 games for Buffalo.
Nessy would have been eligible for the Rule 5 Draft in December -- this move indicates the Blue Jays didn't intend to protect him on the 40-man roster. Nessy has been in Toronto's system since 2010 and split this past season with Class A Lansing and Class A Advanced Dunedin.
The 21-year-old hit .211 with a .580 OPS in 25 games for Dunedin this season. He is a career .248 hitter with a .697 OPS in 260 career Minor League games.
Gregor Chisholm is a reporter for MLB.com. Read his blog, North of the Border, and follow him on Twitter @gregorMLB. This story was not subject to the approval of Major League Baseball or its clubs.