MjwW just gave his guesses on who might be added to the 40-man roster before the Rule 5 Draft, earlier today. He did mention both Brady Dragmire and Blake McFarland as possibilities.
About Dragmire he sad:
Brady Dragmire had a really impressive second half for Dunedin (40K / 5BB in 36.2 innings), and has followed it up with a strong AFL showing. A strong 2016 could put him in the picture next year at this time, but relievers without AA experience or plus-plus stuff aren't Rule 5 candidates.
Likewise, Blake McFarland followed up a strong 2014 (73 strikeouts in 62.1 innings in A+/AA and 15 in 13 innings in the AFL) with an even stronger 2015. He struck out 72 batters in 57.2 innings mostly in AA, but also a midseason promotion to Buffalo. Again, it's not dominating stuff, as a fastball in low 90s and a overhand breaking ball, but it's got the job done.
That brings the Jays up to 35 on the 40-man, so there is still room for more moves before the Rule 5. You can see the full 40-man roster here.