Blue Jays' Josh Johnson has right triceps inflammation, out for at least one week

Starting pitcher Josh Johnson, who has a history of arm injuries, posted a 6.86 ERA in his first four starts. (Tom Szczerbowski/Getty Images) An MRI on

Starting pitcher Josh Johnson, who has a history of arm injuries, posted a 6.86 ERA in his first four starts. (Tom Szczerbowski/Getty Images)

An MRI on Toronto Blue Jays pitcher Josh Johnson revealed inflammation in his right triceps and he hopes to return late next week, Johnson told reporters on Saturday.

Johnson was scratched from his scheduled start on Friday and has been inconsistent in his first four outings, posting a 6.86 ERA and 1.88 WHIP.

He has dealt with numerous arm problems in the past, including Tommy John surgery in 2007 and shoulder inflammation in 2011.

"Just a little tiny bit of inflammation and that's it. All good news," he said on Saturday afternoon.

The 6-foot-7 right-hander will play catch on Sunday and Monday before deciding on when his next start will be, according to CBSSports.com.

Johnson's performance has been one of the main issues plaguing the Blue Jays, who sit in last place in the AL East at 9-15 despite high expectations entering the season.