Are these paraphrases?
At the Labor Eve 2016 , Bute was named as a replacement for Julio Cesar Chavez Jr. , to challenge Badou Jack for the WBC Super - Middleweight - Championship .
On Labor Eve 2016 , Bute was named as the replacement for Julio Cesar Chavez Jr. to challenge Badou Jack for the WBC Super Middleweight Championship .

(a). no;
(b). yes;
(b).