It's a twofer on the Riverside line this morning

they were holding for some unknown reason at Park Street about 8:45 this morning.

The MBTA was also reporting 10-15 minute delays on the Braintree line, due to a disabled train, but that seems to have been cleared up.

I take the Braintree line and for some reason one of the cars was disabled, resulting in a very crowded train and delays with boarding, but luckily I already had a seat...