Had things been normal for Zach Senyshyn, the right wing would have earned Tuesday off the ice after participating in the Bruins’ round-robin rookie tournament against Buffalo and New Jersey the two previous nights.

Nothing, however, has been normal lately for the 19-year-old.

Senyshyn, the No. 15 pick from 2015, participated in an informal practice at Warrior Ice Arena Tuesday. He did not play in either of the Bruins’ wins over their fellow Buffalo and New Jersey rookies.

Such are the conditions of post-appendicitis life, the second significant illness to strike Senyshyn in a two-month period.

In July, Senyshyn was unable to attend the organization’s annual development camp because of mononucleosis.

“Little bit rough,’’ Senyshyn said of his ailments. “But a little bit of adversity is always good for a player to get that out of the way before the season starts.’’

Both Senyshyn and the Bruins were expecting big things during training camp. As the Bruins projected, Senyshyn enjoyed significant development last season.

In his draft year, the right wing compiled 26 goals and 19 assists in 66 games at Sault Ste. Marie of the OHL. In 2015-16, also in the OHL, a stronger, more mature, and more experienced player pumped in 45 goals and added 20 assists in 66 games.

To continue his development, the Bruins planned to feed Senyshyn heavy reps, starting in the rookie tournament and progressing throughout main camp, to determine whether he could make the varsity roster.

The plan has required adjustment because of Senyshyn’s appendectomy. The procedure took place Sept. 4, two days before he planned to arrive in Boston. Tuesday marked his first day back on the ice. He is considered day to day.

Senyshyn can play in nine NHL games this season before burning a year off his entry-level contract. He is not eligible to play in the AHL. He must return to Sault Ste. Marie, his junior team, if he does not make the Bruins full-time. The Bruins are looking for scoring on the right side, where David Pastrnak, David Backes, Jimmy Hayes, and Tyler Randell are among the options.

“I still think I had a really good summer of training,’’ Senyshyn said. “I don’t think it really deterred me very much. I think I was really positive in the way I recovered from both of them.

“As I’m going through recovery right now, I’m really excited and getting my strength back. I’m focusing each day on getting better and making those strides. I think I’ll be back to my old self in no time.’’

Mueller grateful

Peter Mueller, in camp on a professional tryout basis, comes with a rich pedigree. He has 297 games of NHL experience with Florida, Colorado, and Phoenix. He has 63 career goals and 97 assists. The Coyotes selected Mueller No. 8 in 2006.

The Bruins understand that all of it does not guarantee permanent NHL membership. One year after the Coyotes picked Mueller eighth, the Bruins used the No. 8 pick to draft Zach Hamill. Mueller and Hamill were junior teammates. Hamill, who last played in the NHL in 2011-12, is unlikely to secure North American employment. Mueller, who hasn’t played an NHL game since 2012-13, is in a similar category, facing long odds stateside.

“I always check the scores. I always keep looking back to North America,’’ said Mueller, who played for Malmo in Sweden last year. “I always follow up with guys.

“I really tried to commit myself this year to try and make a push back. I was very fortunate that Boston reached out with a PTO. I gladly accepted. I thought it was a good chance to come in and prove my worth. Really take it step by step to prove I’m ready for this.’’

Mueller’s last comeback did not go so well. He signed a one-year, two-way contract with St. Louis for 2014-15. But he did not make the team and was looking at an AHL assignment. Instead of accepting a demotion, Mueller asked for and was granted an outright release, freeing him to return to Switzerland for a second straight season.

Three years of European hockey, however, proved to Mueller that an NHL return was possible. The right-shot wing, sidetracked by concussions earlier in his career, could be an NHL third-liner if he shows trustworthiness.

“I thought I appreciated the game a lot more over there,’’ Mueller said. “To be honest, you don’t really know what you have until you go over there and you’re checking stats and scoring lines back here in North America.

“It teaches you to be humble and gracious with the chances you get here. I owe a lot to that.

“But I’m also trying to make it on my own over here as well and try to prove to everyone that I don’t really want to go back over there.’’

Fluto Shinzawa can be reached at fshinzawa@globe.com. Follow him on Twitter @GlobeFluto.