Put together a solid junior season in which he tallied a 3.38 ERA in 13 starts, but he had just a 2-9 record as the Tiger offense averaged just 2.5 runs per game in his starts.
Tallied 82 strikeouts in 90.2 innings as he moved his career total to 228, tying him for eighth all-time in Mizzou history.
He allowed just 34 earned runs with one complete game shutout, coming on Friday night at Georgia.
He pitched three complete games on the season and walked just 24 batters in 90.2 innings.
In SEC play, he went 3.34 innings and struck out 58 in 62.0 innings.
In his SEC debut against South Carolina (3/8) he went 9.0 innings, allowing just two earned runs and one walk against 10 strikeouts, but was tagged with the loss as Mizzou fell, 2-1.
Had a great outing again in a losing effort against a high-powered LSU (3/29) team as he went 7.2 innings, allowing just five hits, two runs (one earned) while striking out seven and walking just one.
Tossed his second career complete game shutout at Georgia (4/5), scattering just seven hits while walking none and striking out four, earning the win.
Was a tough-luck loser in back-to-back starts against Auburn and Texas A&M, going 8.0 innings in both starts, allowing three and two earned runs, respectively.
Put together a masterful, 124-pitch, 9.0-qaqinning effort in the SEC Tournament opener against Mississippi State, scattering just seventh hits and two walks with one earned run over nine innings while striking out seven.
In all, he pitched on Friday night 11 times on the season, moving his career total to 29 while at Mizzou.
He also started his sixth career postseason game in the SEC Tournament against Mississippi State and moved his career postseason ERA to 2.84 in six career postseason appearances with 25 strikeouts in 38 innings. On full rest in the postseason, Zastryzny has a 1.49 ERA with 22 strikeouts in 30.1 innings pitched (four games).
Was the Tigers' top arm all season long, posting a 3.80 ERA in 17 starts, spanning 109.0 innings.
Boasted 76 strikeouts against just 31 walks while compiling a 5-5 record in his sophomore season in which he was again the Tigers' Friday night starter.
Was named Big 12 Pitcher of the Week on April 30 after his lights-out performance in the series opener at Texas Tech in which he tossed a complete game shutout of the Red Raiders, striking out five and allowing just seven hits on 112 pitches.
He was the first Tiger since Kyle Gibson to throw a complete game shutout in conference play since Kyle Gibson did so in 2009.
Struck out a career-best 12 in a dominating start against Oklahoma State, helping the Tigers to a 2-1 win over the Cowboys at Taylor Stadium - he allowed just one earned run in that start as well.
Allowed just five hits and an earned run while striking out six in a 13-4 win over Kansas State on April 20.
Shutout Texas in the Big 12 Tournament opener, allowing just five hits over 8.1 dominant innings, helping the Tigers to a 5-0 win.
Started the Big 12 Championship game as well, allowing just four runs on three day's rest.
Was also very good in the Tigers' NCAA Regional win over New Mexico State, allowing just two earned runs while striking out five over 6.0 innings in a 6-2 win over the Aggies.
In all, made three starts in the postseason, all within a span of 11 days.
The Tigers won nine of his 17 starts in 2012, including all three of his starts in postseason play.
Compiled a 4.33 ERA in 16 games (15 starts) for the Tigers in 2011 while posting a 2-5 record en-route to earning All-Big 12 Freshman Team honors.
His 87.1 innings pitched were second-best on the team to only Matt Stites in 2011.
Boasted a 70-27 strikeout-walk ratio on the season.
Emerged as the Tigers' Friday night starter midway through the season.
Had a great start at Charlotte (4/26), throwing 6.1 innings and while allowing just one earned run and striking out three.
Tallied a career-best eight strikeouts in his first career Friday night start against Le Moyne (3/11) and allowed just three earned runs in 7.1 innings pitched.
Threw a career-high 8.0 shutout innings against Oklahoma while matching his career-best with eight strikeouts (3/25).
Threw 7.2 innings and allowed just two earned runs while striking out with at Oklahoma State (4/8).
Had another good start against Texas A&M (5/1), giving up just two earned over 5.1 innings while striking out seven.
Shut down Oklahoma State again in the Big 12 Tournament (5/26), allowing just two earned runs over 7.0 innings while striking out seven.
Compiled a record of 26-4 with an 0.71 ERA ad 299 strikeouts for Calallen High School in Corpus Christi, Texas.
Was 17-1 with a 0.20 ERA and 198 strikeouts in his senior season.
Named all-state in 2010 and was a second team All-American.
Was the All-South Texas Pitcher of the Year in 2010.
Selected an all-district pitcher in 2009.
Also had a career batting average of .401 with 14 home runs and 88 RBI.
Team won the state championship in 2008 and was the state runner-up in 2010.
Born March 26, 1992 in Edmonton, Alberta.
Son of James and Sandra Zastryzny.
Is majoring in business administration at MU.