The offseason is still relatively young, especially based on the pace things have worked over the past couple of seasons in baseball, but so far the Blue Jays have been pretty quiet.
They have made a few roster decisions such as releasing Troy Tulowitzki, trading Aledmys Diaz to the Houston Astros, and non-tendering and ultimately releasing Yangervis Solarte as well. As far as acquisitions go, things have been pretty quiet outside of a few minor moves like the recent MiLB contract signed by Eric Sogard.
That should change, especially when it comes to the pitching staff for the 2019 roster.