Mittelstadt earned points on five of the eight goals his team scored to give him an even 30 (11+19) through 34 games.
Mittelstadt and his mates will now wait for the 2018 NCAA Men's Division I Ice Hockey Tournament brackets to be released on March 18 to learn if their season will continue.
Penn State sophomore Brett Murray (2016, fourth round) returned to the lineup two Friday's ago as the fourth-line center, notching one assist and a plus-1 rating as Penn State defeated Minnesota 5-3.
Murray returned on Saturday, but the appearance was brief as he was assessed a game misconduct late in the opening frame for a check to the head as the Nittany Lions eliminated the Gophers with a 6-5 triumph.
Murray, who was unable to connect in Friday's 3-2 loss to Notre Dame in the Big Ten semifinal, has one goal and six points in 20 games for a Penn State club that will now await its placement in the 2018 NCAA Men's Division I Ice Hockey Tournament.
Elsewhere in the Big Ten, motoring winger Linus Weissbach (2017, seventh round) produced a power-play goal and a pair of helpers two weekends ago, but it wasn't enough as Wisconsin was swept at Michigan in the Big Ten quarterfinal round by scores of 6-5 and 7-4.
Weissbach's excellent weekend concludes a rock-solid freshman campaign that saw him finish third in team scoring with 26 points (10+16) in 34 games.
Ivan Chukarov (2015, seventh round) recorded an assist as Massachusetts advanced to the Hockey East quarterfinal with a 5-1 victory over Vermont in the third and deciding game of the best-of-three opening round series.
Chukarov and the Minutemen were pleased to advance to the conference quarterfinals with 17 victories just one year removed from a five-win season, but the pleasure ended there as they were swept by Northeastern 3-2 and 7-2. Chukarov, a junior defenseman, logged two shots on goal and a plus-one rating his season came to an end.
After missing the first nine games of the season due injury, Chukarov was a steady defensive contributor the rest of the way with six assists, an even rating, and 34 shots on goal in the Minutemen's final 31 contests.
Boston College defenseman Casey Fitzgerald (2016, third round) produced five shots on goal over the weekend as Boston College advanced to TD Garden in Boston for the Hockey East semifinals with a 1-0 win over Merrimack on Friday and a 4-3 overtime victory the next night.
Like Fitzgerald, fellow Boston College tri-captain Christopher Brown (2014, sixth round) was unable to produce any points as the Eagles got past Merrimack, leaving the junior forward with eight goals and 18 points in 36 outings.
Jacob Bryson (2017, fourth round) assisted on the game-winning goal Friday as Providence opened their Hockey East quarterfinal series with a 4-3 victory over Maine.
Bryson, who was unable to get back on the score sheet Saturday as the Friars advanced with a 3-2 win over the Black Bears, will look to add to his 25 points (4+21) through 36 games Friday in the semifinal round versus Northeastern.
Philip Nyberg (2016, fifth round) saw his season come to an end over the weekend as Connecticut was swept by Boston University in a Hockey East Quarterfinal, losing 5-4 in overtime on Friday and 2-1 the following evening.
Nyberg appeared in 20 games for the Huskies, notching two goals and three points while leading all team defensemen with a plus-8 rating.
William Borgen (2015, fourth round) recorded one assist Friday as St. Cloud State opened their NCHC quarterfinal series with a 5-2 victory over Miami.
Borgen logged a minus-1 rating as the Huskies dropped a 3-2 overtime decision on Saturday, and provided another assist Sunday as St. Cloud State advanced to the conference semifinal with a 4-3 overtime triumph.
In 33 appearances, Borgen has collected two goals, 12 assists, and a plus-9 rating.
Judd Peterson (2012, seventh round) scored the game-tying goal with 5:52 remaining in regulation Sunday as St. Cloud State eliminated Miami from the NCHC Tournament with a 4-3 overtime win.
Peterson, who went without a point as the clubs split the first two games of the series, has six goals and 18 points in 37 appearances this season.
St. Cloud State now moves on to face North Dakota Friday in the NCHC semifinal.