2013: Compiled a record of 5-10-5 with four shutouts and a 1.33 goals against average in 21 starts in 2013 – passing Mark Dougherty for third on the club’s all-time list for career starts, appearances, and minutes played in goal. The team’s fifth-most successful goalkeeper all-time in terms of career wins – passing Brad Freidel in 2013, Gruenebaum recorded his 15th career shutout and earned the first of his three ‘Save of the Week’ nominations this season in a win at Chivas USA (March 2). The match against Chivas USA would start a string of 18 consecutive MLS matches that Gruenebaum would start from March 2-July 4. During that stretch, he would record four or more saves in six consecutive matches from March 16-April 27, and record career shutouts No. 16 at Toronto (May 18) and No.17 against Montreal (June 15). Missed the match as a game-time decision against Portland (July 7) with a shoulder injury and returned to action against New England (July 20) where he suffered two stoppage-time goals in the 2-0 loss. Was diagnosed with left shoulder weakness and missed nine consecutive matches as a result from August 3-September 14, but traveled with the team to assist in goalkeeping coaching duties while not in the gameday 18 at Sporting KC (September 7). Was upgraded to ‘questionable’ ahead of the match against Chicago (September 21), but did not dress and returned as the primary backup for the match at FC Dallas (September 29). Started the club’s 2013 regular-season finale in the 1-0 loss against New England (October 27). Went 1-0-1 with a 2.00 goals against average in two starts in MLS Reserve League and made one start in the 2-1 Fourth Round loss at Chicago (June 13) in the 2013 Lamar Hunt U.S. Open Cup.
2012: Gruenebaum enjoyed a breakout season in 2012, starting 33 matches in place of the injured William Hesmer. The netminder recorded a League-high 124 saves on his way to 13 wins and eight shutouts. The veteran was a strong contender in All-Star and MLS Goalkeeper of the Year voting, boasting a 1.26 goals against average. Gruenebaum recorded his first career assist on September 29, sending a long ball to a sprinting Jairo Arrieta to help defeat the Philadelphia Union. The netminder earned the Crew's 2012 Most Valuable Player, Defender of the Year and Breakthrough Performance awards.
2011: The Crew goalkeeper made two starts, recording shutouts in each. He also started in seven Reserve matches and the Crew's U.S. Open Cup match against Richmond.
2010: Gruenebaum did not appear in a regular season match after missing the first three months of the season with a right hip impingement He started both MLS Playoff matches against Colorado, recording seven saves. He started in all six matches and went 4-2 in the 2010-11 CONCACAF Champions League, recording three shutouts.Gruenebaum started in all four matches in the Crew's run to the Lamar Hunt U.S. Open Cup Final, recording a shutout on July 6 vs. the Charleston Battery.
2009: The netminder appeared in 10 matches, all starts. He missed the last six matches of he season due to a right hip impingement. In the U.S. Open Cup, Gruenebaum started Round of 16 match at Rochester.
2008: Gruenebaum appeared in and started in one game, a 3-1 loss at New York on October 18. He was a member of the Crew's 2008 MLS Cup championship team, but did not see action in the playoffs. Gruenebaum started in the USOC Qualifier vs. Real Salt Lake on May 27, registering a shutout in the process. He appeared and started in seven games in the MLS Reserve League, finishing with a 2-4-1 record and 1.29 goals-against average.
2007: Gruenebaum started all 10 games in which he appeared. Gruenebaum followed up his first career shutout, earned in season-opening 0-0 tie against New York on April 7, with his second career clean sheet against Real Salt Lake on April 14, another scoreless draw. He registered third shutout of season on April 28, a 1-0 win over D.C. United. Gruenebaum went 1-4-5 on season with a 1.50 GAA. He came on as a sub and played the final 56 minutes of the Crew’s USOC qualifier vs. L.A. on April 24 and did not surrender a goal. Gruenebaum started all five games in which he appeared, finishing with a 2-1-2 record, posting a 1.40 GAA and one shutout in the MLS Reserve League.
2006: As a rookie, Gruenebaum appeared in three matches overall and started the final two games of the season, going 1-1-0. The University of Kentucky product earned his first career win in his first start on October 7 at Chicago, making five saves in the 4-1 win. He made seven saves in 1-0 loss at N.E. on October 14. Gruenebaum made his MLS debut on May 20 against. D.C. United, coming on as a substitute after Jon Busch tore his right ACL. The rookie played the final five minutes with a broken right hand suffered in practice the day before. Gruenebaum appeared in nine games, eight of them starting assignments in the MLS Reserve League. He went 0-5-1 with one shutout and a 1.87 goals-against average.