Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Date | Opponent | Score | Loss | Save |
| --- | --- | --- | --- | --- |
| April 1 | at Minnesota Twins | 7-5 | Miceli | Aguilera |
| April 3 | at Minnesota Twins | 7-6 | Jones | &#124;&#124;10,827&#124;&#124;0-2 |
| April 3 | at Minnesota Twins | 10-6 | Blair | Naulty |
| April 4 | at Boston Red Sox | 8-7 | Levine | Sager |
| April 5 | at Boston Red Sox | 15-12 | Castillo | Jones |
| April 6 | at Boston Red Sox | 5-3 | Brocail | Hernandez |
| April 7 | Minnesota Twins | 10-4 | Rodriguez | &#124;&#124;42,749&#124;&#124;3-4 |
| April 9 | Minnesota Twins | 10-5 | Ritchie | &#124;&#124;6,477&#124;&#124;4-4 |
| April 10 | Minnesota Twins | 7-3 | Blair | &#124;&#124;6,381&#124;&#124;4-5 |
| April 11 | Boston Red Sox | 5-4 | Drabek | Jones |
| April 13 | Boston Red Sox | 11-8 | Lira | &#124;&#124;0&#124;&#124;5-6 |
| April 13 | Boston Red Sox | 4-2 | Hernandez | &#124;&#124;10,818&#124;&#124;6-6 |
| April 14 | at Milwaukee Brewers | 7-0 | Moehler | &#124;&#124;6,079&#124;&#124;6-7 |
| April 15 | at Milwaukee Brewers | 3-1 | Karl | Jones |
| April 16 | Seattle Mariners | 7-3 | Sager | &#124;&#124;8,090&#124;&#124;7-8 |
| April 17 | Seattle Mariners | 8-6 | Bautista | Charlton |
| April 18 | Oakland Athletics | 9-5 | Myers | &#124;&#124;7,748&#124;&#124;7-10 |
| April 19 | Oakland Athletics | 7-1 | Thompson | &#124;&#124;10,592&#124;&#124;7-11 |
| April 20 | Oakland Athletics | 9-2 | Karsay | &#124;&#124;9,281&#124;&#124;8-11 |
| April 21 | at Texas Rangers | 7-6 | Vosberg | Miceli |
| April 23 | at Texas Rangers | 2-1 | Brocail | &#124;&#124;35,230&#124;&#124;9-12 |
| April 24 | at Texas Rangers | 4-2 | Thompson | Wetteland |
| April 25 | at Anaheim Angels | 8-3 | Lira | &#124;&#124;30,464&#124;&#124;9-14 |
| April 26 | at Anaheim Angels | 2-0 | Finley | &#124;&#124;30,872&#124;&#124;10-14 |
| April 27 | at Anaheim Angels | 6-5 | Myers | &#124;&#124;16,409&#124;&#124;10-15 |
| April 29 | Milwaukee Brewers | 2-1 | Olivares | Jones |
| April 30 | Milwaukee Brewers | 8-4 | Karl | &#124;&#124;12,888&#124;&#124;11-16 |
Question:
what team lost on april 15
Answer:
Karl