The database returned zero recorded matches between Boros and Tron in Modern since May 18th, 2026. This can happen when either the two archetypes rarely cross paths in the top tables of tracked events, or when the specific Boros variant you have in mind (e.g. Boros Energy, Boros Burn, Boros Convoke) is listed under a more specific archetype name rather than a generic "Boros" label. There are 54 Modern tournaments in the database over that window, so coverage is solid.
If you can clarify which Boros archetype you mean, I can try again with a more specific name and may get a result.
Sources: Data drawn from 54 Modern tournaments (May 18 - June 8, 2026), 63% MTGO and 37% Melee.