Hinostroza, 24, had 25 points (seven goals, 18 assists) in 50 games with the Blackhawks last season. It was his most extensive NHL action since being selected by Chicago in the sixth round (No. 169) in the 2012 NHL Draft. He had 39 points (13 goals, 26 assists) in 106 games in three seasons with the Blackhawks.
"In Chicago, there are just so many of those guys that are already established in the city and the organization," Hinostroza said. "I'm really excited about the opportunity that I'm going to be given and I'm going to keep earning with hard work. I'm not going there thinking anything is going to be given to me."
Oesterle, 26, had 15 points (five goals, 10 assists) in 55 games. In four NHL seasons with the Blackhawks and Edmonton Oilers, he has 21 points (five goals, 16 assists) in 80 games.
Kruger, 28, returns to Chicago after he had six points (one goal, five assists) in 48 games with the Carolina Hurricanes last season. The Blackhawks traded Kruger to the Vegas Golden Knights on July 2, 2017, and Vegas traded him to Carolina on July 4. The Hurricanes traded him to the Coyotes on May 3, 2018.
"Now I have the chance [with Chicago again] and I really want to do something good with it," Kruger said. "I couldn't think of a better place than here to come back and show that I can play and be a good player. I'm really excited to show that and happy to be back."
He has 111 points (34 goals, 77 assists) in 446 NHL games with the Blackhawks and Hurricanes, and won the Stanley Cup with Chicago in 2013 and 2015.