Am I The Only One Worried About Masahiro Tanaka?

Am I the only one that is a little worried about Masahiro Tanaka? Granted he was absolutely amazing to start the season and some regression had to be expected and yes granted he has still been great and with a little run support would be 15-0 right now but none of this makes me worry any less. If this were Tanaka's second season in the big leagues and he had some more experience with the hot summers and the starts every fifth day I would chalk it up to a "bad" stretch but I am beginning to get concerned.

Tanaka's last four starts have been two losses and two victories but we have seen his ERA jump 0.25 points. Again, his ERA is great even with the up tick of 2.27 and he could not be expected to carry a 2.00 or below ERA all season but this post is more concern for August, September, and possibly October more than it is now. Tanaka has allowed four of his 13 home runs this season in his last four while only allowing nine in his 13 starts. Tanaka also allowed seven doubles in his last four starts while only allowing 15 doubles in his other 13 starts. Tanaka's K numbers are down as well in his last four only striking out 10,6,8, and three Twins last time out.

Maybe I'm overreacting, but maybe I'm not.