The MCA Under-21 side competes in the Wright Shield each November against other Associations. It provides most of the Mercantile side that competes in the Mildura Willowfest each December. It also plays an annual match on Australia Day against an MCA Over-40s XI. All players under the age of 21 at Sept 1 are eligible for the side. 

The annual Australia Day match against the Over-40s has been played since 2002, and has produced many close contests. Scores have been:

2002: Under-21s 7-180 (Sloman 35 Levitski 25 Sexton 2-22 Herbst 2-27 A.Miller 2-30) d Veterans 9-cc-154 (Kahn 54* Herbst 23 Glover 4-9 Jaacks 3-27)

2003: Under-21s 217 (Naughtin 75 Looker 28 Whiting 27 O'Shannassy 20 White 5-23 Attrill 3-40 Nicholson 2-49) d Veterans 6-cc-209 (Kahn 80 Grant 35 White 30* Nicholson 25 Hickie 2-13)

2004: Veterans 9-158 (I.Miller 42 Neal 40 Kahn 25 Thomson 24 Adams 4-23) d Under-21s 154 (Whiting 60 Darbyshire 21 Campbell 3-39 Thomson 2-16 Yeats 2-24).

2005: Veterans 5-126 (Scotland 41* Kahn 26* Eaton 19 Jaacks 2-14) d Under-21s 125 (Whiting 50 Adam 35* Scotland 3-18 Donovan 3-24)

2006: Under-21s 6-155 (Mukunthan 60 Adam 57) d Veterans 8-cc-154 (Bettany 38 Neal 37 McCorkell 3-31)

2007: Veterans 8-242 (Scotland 81 Kahn 58* Eaton 34 Sandri 19 Sheedy 4-36) d Under-21s 7-cc-241 (Gatehouse 73 Righetti 54 McDermott 51 Tuckey 21 Ampt 20* Sandri 2-16 McLeod 2-42 Donovan 2-48)

2008: Veterans 206 (Barker 63 Sosic 36 Gatehouse 3-20) d Under-21s 123 (Baird 55 Kohli 31 Lagona 3-3 Ives 2-17 Evans 2-26)

2009: Under-21s 6-cc-299 (Jamieson 88 Buttigieg-Clark 83 Baird 26 Righetti 21* Nicholson 4-60 Lagona 2-51) d Veterans 253 (Lagona 48 Kahn 33 Nicholson 29 Cherry 27 Clark 26 Donnelly 3-28 Leydon 2-47)

2010: Veterans 6-208 (S.Snooks 104* Donovan 35 Lagona 30 Nicholson 20 Mirabella 2-30) d Under-21s 3-cc-193 (Daffy 60 Costigan 54* Jane 51 W.Long 22* D.Long 2-43)

2011: Veterans 6-150 (Donovan 39* Kahn 39 S.Snooks 34) d Under-21s 142 (Solomon 76 Thomson 3-17)

2012: Under-21s 108 (A.Snooks 48 D.Laufenberg 21 S.Rando 3-25 M.Foot 2-17) d Veterans 98 (G.Donovan 30 J.Coxon 3-10 G.Regan 3-11 J.Jesson 2-22)

2013: Under-21s 124 (A.Snooks 41 S.Scotland 29 Cartledge 3-27 Cherry 2-19 Van Staden 2-26) d Veterans 94 (S.Snooks 32 Laufenberg 3-17 Potocnik 3-22 N.West 2-7)

2014: Veterans 8-cc-159 (Cherry 46* Scotland 29 Clements 2-25 Brelis 2-47) d Under-21s 151 (Kruisheer 48 Clements 27 Cherry 3-26 Van Staden 2-16 J.Scotland 2-20 Huxley 2-24)

2015: Veterans 5-cc-223 (Gill 76 Scotland 58* Huxley 25* Kahn 21 Sharma 2-55) d Under-21s 9-cc-216 (Snooks 86 Sharma 60 Fetter 19 Cartledge 3-26 Huxley 2-25)

2016: Veterans 6-cc-212 (Booth 49* Passante 40 Mariadason 37* Kahn 29 Wilkinson 4-24 Vos 2-41) d Under-21s 172 (Snooks 54 A.Sheikh 27 Wilkinson 26 Cartledge 3-30 Booth 2-29 Morton 2-39)

2017: Under-21s 4-211 (Fidock 110* Carter 50 Sabharwhal 39) d Veterans 4-cc-208 (Mariadason 51 Sandri 35 Huxley 33* Kahn 33 Lagona 28 Gunawardena 2-44)

2018: Under-21s 7-147 (M.Johnson 50 N.Singh 19 P.Huxley 2-17) d Veterans 145 (J.Huddle 59 A.Kahn 23 A.Lagona 21 L.Smith 4-33 A.Meyerowitz 2-1 B.Dinger 2-14) 

2019: Veterans 153 (M.Irving 33 R.Passante 27 M.Whelan 3-32 M.Pearson 2-4 T.Sutherland 2-17) d Under-21s 115 (T.Sutherland 28* P.Pirozek 23 S.Rando 3-17 G.Cartledge 3-24)

2020: Veterans 7-122 (M.Irving 42 A.Kahn 25* W.Singleton 21 J.Crook 3-15 A.Khan 3-26) d Under-21s 119 (V.Khandelwel 21* T.Reid 18 S.Rando 3-10)