Casey Janssen RP TOR 2 Days

Blue Jays manager John Gibbons said Friday that Casey Janssen (back) will miss at least the next two weeks due to a strained muscle in his abdomen/lower back.

It's a tough break for the Jays closer, who was hoping to return to the team in mid-April. Sergio Santos is serving as the ninth-inning man in his absence, but suffered an ugly blown save in his last outing.

Casey Janssen RP TOR 3 Days

Casey Janssen has been shut down temporarily with renewed discomfort in his lower back.

Janssen threw a scoreless rehab inning on Tuesday but woke up the next day with a sore back. He has been on the disabled list since the end of spring training with a strained muscle in his lower back and abdomen. Sergio Santos remains the Blue Jays' closer.

Casey Janssen RP TOR 7 Days

Casey Janssen (back) will begin a rehab assignment with High-A Dunedin on Monday.

While he will report to the team Monday, it might not be until Tuesday when Janssen gets into a game. He's expected to need 2-3 appearances before being activated, which could come by the end of this week. It's not clear whether Janssen will immediately get his closer job back or if Blue Jays manager John Gibbons will ease him back into things.

Casey Janssen RP TOR 8 Days

Casey Janssen (abdomen) threw another successful bullpen session on Saturday afternoon.

Janssen felt good during and after the workout, and is likely to embark on a minor league rehab assignment early next week. Sergio Santos remains the Blue Jays' fill-in closer for now, but Janssen is coming soon.

Casey Janssen RP TOR 11 Days

Casey Janssen (back) threw a successful bullpen session on Wednesday afternoon.

Blue Jays manager John Gibbons called the workout "impressive." Janssen will throw another bullpen session in a couple of days and could then be cleared for a minor league rehab assignment. If he can avoid setbacks, he should be cleared to join the Jays by the end of next week. Sergio Santos will continue to close for now.

Casey Janssen RP TOR 12 Days

Casey Janssen (back) is not expected to be activated from the disabled list on Sunday when first eligible.

The good news is that Janssen threw a bullpen session Sunday and is slated for another one Wednesday. He'll need a short rehab assignment but could be activated sometime next week. "I'll have to go down to rehab somewhere, but hopefully shortly thereafter," he said. "The hardest part is staying within that comfort zone, but still progressing. You want to go fast, but you don't want to go fast and have a setback. That's the tricky part."

Casey Janssen RP TOR 12 Days

Casey Janssen (back) will throw a bullpen session Wednesday.

If it goes well, he could be cleared for a minor league rehab assignment. Janssen was placed on the 15-day disabled list at the end of spring training with a left abdominal strain. He should be activated next week. Sergio Santos will continue to fill in at closer for now.

Casey Janssen RP TOR 17 Days

Casey Janssen (back) played long-toss from 120 feet Thursday.

It's the first time he's done so since being placed on the disabled list with a lower back strain. Janssen is expected to long-toss a few more times before being cleared to throw off a mound. While the Blue Jays haven't set a timetable for the closer's return, they're hoping he'll be ready on April 13 when first eligible.

Casey Janssen RP TOR 20 Days

Casey Janssen will be shut down from throwing until the tightness in his side clears up.

Janssen was placed on the 15-day disabled list Sunday with a left abdominal strain and could need around three full weeks of recovery time. Sergio Santos will be filling in at closer for the Blue Jays in the early going.

Casey Janssen RP TOR 21 Days

Blue Jays placed RHP Casey Janssen on the 15-day disabled list, retroactive to March 29, with a left abdominal/lower back strain.

It's not clear when Janssen suffered the injury or how long he'll be sidelined. The reliever also dealt with shoulder issues this spring, as he was limited to just three spring outings. The Blue Jays will presumably use Sergio Santos in the ninth inning while Janssen is out, though Steve Delabar could also get a look.