2020 Roster of Minor League Umpires Approved for MLB

A record 19 new umpires made their major league debuts during the 2020 MLB season following an unprecedented number of opt out requests from the full-time umpire staff. Baseball created a new roster class for these Minor League umpires approved to call MLB games, separate from the existing call-up/fill-in list, and assigning these 19 taxi squad umpires triple-digit uniform numbers.

MLB's circa-2019 call-up roster remained the same for 2020. Refer to the CCS Umpire Roster & Crews page for a complete listing.

Related: MLB 2020 COVID-modified crew list

Now that all Triple-A non-call-up umpires have made their big league debuts, the following is MLB's list of deputized MiLB umpires authorized to call MLB games (with corresponding links to the announcement news posts of their respective debuts), sorted by sleeve number (which itself is sorted alphabetically):

Uniform Jersey #) Name [Date of 1st MLB Regular Season Game]

100) Arrieta, David (8/21/20)

101) Bacchus, Erich (8/7/20)

102) Beck, Adam (8/5/20)

103) Ceja, Nestor (8/14/20)

104) Clemons, Paul (8/19/20)

105) MacKay, Alex (8/21/20)

106) McCrady, Kyle (9/4/20)

107) Merzel, Dan (8/29/20)

108) Moore, Malachi (8/17/20)

109) Moscoso, Edwin (7/23/20)

110) Navas, Jose (7/24/20)

111) Ramos, Charlie (8/25/20)

112) Riggs, Jeremy (7/28/20)

113) Rosenberg, Randy (8/4/20)

114) Tomlinson, Nate (8/7/20)

115) Valentine, Junior (8/26/20)

116) Vondrak, Clint (8/10/20)

117) Williams, Lew (8/2/20)

118) Wills, Ryan (8/22/20)