We shall see is really all we can say at this point. We've already seen several promotions at the lower levels - Frelick, who you mention, was just promoted to Biloxi's Double-A affiliate a mere 2-3 weeks ago. Nashville is so loaded with veteran talent it's hard to see promotions there as they are truly set-up to be the AAAA club for the Big Club - David Stearns talked about that in his most recent sit-down with Jeff Hem during the Jacksonville series (Listen to the Two-Part interview: Here and Here). They are already stacked with veterans - many of whom already have Big League experience - who can fill an injury or COVID void at the drop of the hat. Stearns, in those same interviews, alludes to what the organization already knows: Brice Turang is an MLB player today. BUT, they have a really good SS already playing every day. The depth problem is a good problem to have. Outside of some possible ongoing pitching promotions from say the ACL to Low-A Carolina before their season kicks off here in Maryvale on June 6th, and some fringe demotions (see Ashton McGee heading back down to High-A Wisconsin, for example), we might just see things stay put for the time being at the Triple-A level while the reshuffling and promotions happen amongst the Low-A to Double-A teams. It's a fun time to be a Minor League fan of the Brewers!
And, of course, this being said: Andy Otero was recently promoted to Nashville's pitching staff (which was great to see as Andy works extremely hard and is just a solid hurler) and one would have to ask: When is Tyler Herb getting the call - he's been literally lights out since named a Starter a month or so ago.