I would note that despite the athletics' fields being totally fabricated space (many now covered with plastic and other synthetics) having some margins that are biological does make small contributions to biodiversity and does remediate some of the ill effects caused by the fields. Having grassy margins can encourage increased biodiversity and improved ecological health.
For example, grass plants, dandelion, and thistles attract small birds (like sparrows and goldfinches) when they go to seed (which can’t happen if sprayed or cut). Allowing margins to grow in ways that some (perhaps donors?) find unsightly is in fact beneficial to our overall wellbeing.
I am sure there is a ready answer that will explain to me that roundup is actually ok to use and that UBC has net positive ecological impacts. I appreciate all that. Yet. ...
It still calls out for a quiet moment of reflection and consideration to reconsider whether a scorched earth look along the baseball field fences is worth the addition of more toxic chemicals into our local environment, however small these effects might be.