A dramatic 12-9 win over the Stormers secured the Sharks' spot in the Super Rugby play-offs, where they will be joined by the Bulls.
Former All Blacks duo Sonny Bill Williams and Ma'a Nonu may have played their last games for the Blues on Saturday.
The Brumbies and the Hurricanes recorded contrasting victories on Saturday ahead of home quarter-finals.
Japanese visitors the Sunwolves were no match for the in-form Jaguares, who ran in eight tries to two in Buenos Aires on Friday.
Shaun Stevenson scored a hat-trick of tries as the Chiefs tore apart the Rebels to qualify for the Super Rugby play-offs in style.
South Africa hooker Malcolm Marx will make a short-term move to Japan after the Rugby World Cup before returning to the Lions.
Tevita Kuridrani is staying with the Brumbies after re-signing with Rugby Australia until the end of 2020.
Ronan O'Gara will take the next step in his coaching career with Top 14 side La Rochelle after the Irishman opted to leave the Crusaders.
Brodie Retallick will remain with New Zealand Rugby until 2023, a contract that includes a stint in Japan.
Toulon-bound back Nehe Milner-Skudder will not give up in his bid to play in the World Cup despite requiring more surgery.